diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 2dd2f64..5e5dd8c 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -9,6 +9,7 @@ path = "src/main.rs"
 
 [dependencies]
 anyhow = "1"
+chrono = "0.4"
 clap = { version = "4", features = ["derive"] }
 console = "0.16"
 nix = { version = "0.31", features = ["sched"] }
@@ -16,3 +17,4 @@ itertools = "0.15"
 packie = { path = "../" }
 rust-i18n = "4"
 indicatif = "0.18"
+dialoguer = "0.12"
diff --git a/cli/src/clean.rs b/cli/src/clean.rs
new file mode 100644
index 0000000..d03406d
--- /dev/null
+++ b/cli/src/clean.rs
@@ -0,0 +1,78 @@
+use clap::Parser;
+use packie::PackieBuilder;
+use rust_i18n::t;
+use std::path::PathBuf;
+
+#[derive(Debug, Parser)]
+pub struct Cli {
+    #[arg(short, long, default_value = "true")]
+    packages: bool,
+
+    #[arg(short, long)]
+    verbose: bool,
+}
+
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
+    let packie = PackieBuilder::new().build()?;
+
+    let repos_dir = packie.cache().repos_dir();
+
+    if cli.packages {
+        clean_packages(&cli, &repos_dir);
+    }
+
+    Ok(())
+}
+
+fn clean_packages(cli: &Cli, repos_dir: &PathBuf) {
+    let read_repos_dir_errx =
+        |e: &std::io::Error| eprintln!("{}", t!("clean.warn_repos_dir", error = e));
+    let Ok(repos) = std::fs::read_dir(&repos_dir).inspect_err(read_repos_dir_errx) else {
+        return;
+    };
+    for repo in repos {
+        let Ok(repo) = repo.inspect_err(read_repos_dir_errx) else {
+            break;
+        };
+        let read_repo_dir_errx = |e: &std::io::Error| {
+            eprintln!(
+                "{}",
+                t!(
+                    "clean.warn_repo_dir",
+                    name = repo.file_name().display().to_string(),
+                    error = e
+                )
+            )
+        };
+        let Ok(repo) = std::fs::read_dir(repo.path()).inspect_err(read_repo_dir_errx) else {
+            continue;
+        };
+        for file in repo {
+            let Ok(file) = file.inspect_err(read_repo_dir_errx) else {
+                break;
+            };
+            if file.file_name().as_encoded_bytes().ends_with(b".pkg") {
+                match std::fs::remove_file(file.path()) {
+                    Ok(()) => {
+                        if cli.verbose {
+                            eprintln!(
+                                "{}",
+                                t!("clean.info_remove_file", path = file.path().display())
+                            );
+                        }
+                    }
+                    Err(err) => {
+                        eprintln!(
+                            "{}",
+                            t!(
+                                "clean.warn_remove_file",
+                                path = file.path().display(),
+                                error = err
+                            )
+                        );
+                    }
+                };
+            }
+        }
+    }
+}
diff --git a/cli/src/common.rs b/cli/src/common.rs
index 0592d43..7f0eadc 100644
--- a/cli/src/common.rs
+++ b/cli/src/common.rs
@@ -1,4 +1,32 @@
-use console::Term;
+use chrono::{Local, TimeZone};
+use console::{Term, style};
+use indicatif::ProgressStyle;
+use rust_i18n::t;
+
+pub fn progress_style_multidownload() -> ProgressStyle {
+    let mut lines = Vec::with_capacity(3);
+    let (_, cols) = Term::stderr().size();
+
+    let short_first_line = format!("{{spinner}} {prefix}", prefix = style("{prefix}").green());
+    let info_line = format!(
+        "{speed}{{bytes_per_sec}}   {current}{{bytes}}   {total}{{total_bytes}}   {eta}{{eta}}",
+        speed = t!("common.progress_style.speed"),
+        current = t!("common.progress_style.current"),
+        total = t!("common.progress_style.total"),
+        eta = t!("common.progress_style.eta"),
+    );
+    let long_first_line = format!("{short_first_line}   {info_line}");
+    if cols > 100 {
+        lines.push(&long_first_line[..]);
+    } else {
+        lines.push(&short_first_line[..]);
+        lines.push(&info_line[..]);
+    }
+
+    lines.push("{wide_bar}");
+
+    ProgressStyle::with_template(&lines.join("\n")).unwrap()
+}
 
 pub fn yesno(prompt: &str) -> bool {
     eprint!("{prompt} [y/N] ");
@@ -14,11 +42,11 @@ pub fn yesno(prompt: &str) -> bool {
 }
 
 pub fn print_list(indent: u32, list: impl Iterator<Item = impl AsRef<str>>) {
-    let (row, _) = Term::stdout().size();
+    let (_, cols) = Term::stdout().size();
     let mut line_used: usize = 0;
     for i in list {
         let mut i = i.as_ref().to_string();
-        if line_used >= row as _ {
+        if line_used >= cols as _ {
             line_used = 0;
             println!();
         }
@@ -40,3 +68,10 @@ pub fn format_size(bytes: u64) -> String {
         _ => format!("{:.3} GB", (bytes as f64) / 1000000000.),
     }
 }
+
+pub fn format_datetime(timestamp: i64) -> String {
+    let Some(datetime) = Local.timestamp_opt(timestamp, 0).earliest() else {
+        return "?".into();
+    };
+    datetime.to_string()
+}
diff --git a/cli/src/info.rs b/cli/src/info.rs
index 9d50322..869acaf 100644
--- a/cli/src/info.rs
+++ b/cli/src/info.rs
@@ -1,5 +1,4 @@
-use crate::common::format_size;
-use anyhow::anyhow;
+use crate::{common::format_size, error};
 use clap::Parser;
 use packie::{
     PackieBuilder,
@@ -7,20 +6,30 @@ use packie::{
     package::{PkgManifest, PkgSpec},
 };
 use rust_i18n::t;
+use std::fmt::Write;
 
 #[derive(Debug, Parser)]
 pub struct Cli {
     pkgspec: PkgSpec,
 }
 
-pub fn main(cli: Cli) -> anyhow::Result<()> {
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
     let mut packie = PackieBuilder::new().readonly(true).build()?;
     let mut found = packie.search_installation(&cli.pkgspec)?;
     if found.len() == 0 {
-        return Err(anyhow!("{}", t!("info.no_package_found")));
+        return Err(error!("info.no_package_found"));
     }
     if found.len() != 1 {
-        return Err(anyhow!("{}", t!("info.pkgspec_not_unique")));
+        let mut note = String::new();
+        writeln!(&mut note, "{}", t!("info.note_pkgspec_not_unique")).unwrap();
+        for i in found.iter() {
+            writeln!(&mut note, " - {}", i.pkg_manifest.pkg_ident()).unwrap();
+        }
+
+        return Err(crate::Error {
+            message: t!("info.error_pkgspec_not_unique").into(),
+            note: Some(note),
+        });
     }
     let found = found.remove(0);
 
@@ -72,7 +81,7 @@ fn print_install_misc(installation: &Installation) {
     println!(
         "{}: {}",
         t!("info.print_install_misc.install_date"),
-        installation.install_date,
+        crate::common::format_datetime(installation.install_date),
     );
     println!(
         "{}: {}",
diff --git a/cli/src/initdb.rs b/cli/src/initdb.rs
index 489b188..b2d4801 100644
--- a/cli/src/initdb.rs
+++ b/cli/src/initdb.rs
@@ -4,7 +4,7 @@ use packie::PackieBuilder;
 #[derive(Debug, Parser)]
 pub struct Cli {}
 
-pub fn main(cli: Cli) -> anyhow::Result<()> {
+pub fn main(_: Cli) -> Result<(), crate::Error> {
     PackieBuilder::new().build()?;
     Ok(())
 }
diff --git a/cli/src/install.rs b/cli/src/install.rs
index 77cde88..b2d80f3 100644
--- a/cli/src/install.rs
+++ b/cli/src/install.rs
@@ -1,5 +1,6 @@
 use crate::common::{format_size, print_list, yesno};
 use clap::Parser;
+use console::style;
 use indicatif::ProgressBar;
 use itertools::Itertools;
 use packie::{
@@ -9,16 +10,19 @@ use rust_i18n::t;
 
 #[derive(Debug, Parser)]
 pub struct Cli {
+    /// Force the specified items to be files
     #[arg(short, long)]
     file: bool,
 
+    /// Don't require manual confirmation
     #[arg(short, long)]
     yes: bool,
 
+    /// Items to be installed
     items: Vec<String>,
 }
 
-pub fn main(cli: Cli) -> anyhow::Result<()> {
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
     let mut packie = PackieBuilder::new().build()?;
     if cli.file {
         for item in cli.items {
@@ -37,7 +41,7 @@ pub fn main(cli: Cli) -> anyhow::Result<()> {
         .collect();
 
     if packages.is_empty() {
-        eprintln!("No packages to install.");
+        eprintln!("{}", t!("install.no_package_to_install"));
         return Ok(());
     }
 
@@ -45,7 +49,12 @@ pub fn main(cli: Cli) -> anyhow::Result<()> {
     let installed_size: u64 = packages.iter().map(|x| x.repo_pkg.installed_size).sum();
 
     println!("{}", t!("install.prompt_to_install"));
-    print_list(4, packages.iter().map(|x| x.pkgspec.to_string()));
+    print_list(
+        4,
+        packages
+            .iter()
+            .map(|x| style(&x.pkgspec).green().to_string()),
+    );
     println!(
         "{}",
         t!("install.download_size", size = format_size(download_size))
@@ -61,11 +70,13 @@ pub fn main(cli: Cli) -> anyhow::Result<()> {
         return Ok(());
     }
 
-    let progress_bar = ProgressBar::new(download_size);
+    let progress_bar =
+        ProgressBar::new(download_size).with_style(crate::common::progress_style_multidownload());
     let mut package_files = Vec::with_capacity(packages.len());
     for package in packages.iter() {
         let init_pos = progress_bar.position();
         progress_bar.println(format!("Downloading \"{}\"...", package.pkgspec));
+        progress_bar.set_prefix(package.repo_pkg.pkg_manifest.pkg_ident().to_string());
         let path = packie.download_package(
             &package.repo_name,
             &package.repo_pkg.pkg_manifest.pkg_ident(),
diff --git a/cli/src/main.rs b/cli/src/main.rs
index 39c216c..1f831fc 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -1,3 +1,4 @@
+mod clean;
 mod common;
 mod info;
 mod initdb;
@@ -5,9 +6,11 @@ mod install;
 mod print;
 mod remove;
 mod repo_admin;
+mod select;
 mod update;
 
 use clap::Parser;
+use console::style;
 use rust_i18n::t;
 use std::path::{Path, PathBuf};
 
@@ -24,6 +27,9 @@ struct Cli {
 
 #[derive(Debug, Parser)]
 enum Subcommand {
+    /// Clean cache data
+    Clean(clean::Cli),
+
     /// Get package information
     Info(info::Cli),
 
@@ -44,11 +50,15 @@ enum Subcommand {
 
     /// Update repository indexes
     Update(update::Cli),
+
+    /// Select global link
+    Select(select::Cli),
 }
 
 fn main() {
     rust_i18n::set_locale(match std::env::var("LANG").as_deref() {
         Ok("zh_CN.UTF-8") => "zh-CN",
+        Ok("ja_JP.UTF-8") => "ja",
         _ => "en",
     });
 
@@ -56,10 +66,11 @@ fn main() {
     if let Some(new_root) = cli.chroot
         && let Err(err) = chroot(&new_root)
     {
-        eprintln!("{}", t!("main.error", error = err));
+        eprintln!("{}", style(t!("main.error", error = err)).red());
         std::process::exit(1);
     }
     let result = match cli.subcommand {
+        Subcommand::Clean(cli) => clean::main(cli),
         Subcommand::Info(cli) => info::main(cli),
         Subcommand::InitDb(cli) => initdb::main(cli),
         Subcommand::Install(cli) => install::main(cli),
@@ -67,9 +78,13 @@ fn main() {
         Subcommand::Remove(cli) => remove::main(cli),
         Subcommand::RepoAdmin(cli) => repo_admin::main(cli),
         Subcommand::Update(cli) => update::main(cli),
+        Subcommand::Select(cli) => select::main(cli),
     };
     if let Err(err) = result {
-        eprintln!("{}", t!("main.error", error = err));
+        eprintln!("{}", style(t!("main.error", error = err.message)).red());
+        if let Some(note) = err.note {
+            eprintln!("{}", style(t!("main.note", note = note)).blue());
+        }
         std::process::exit(1);
     }
 }
@@ -89,3 +104,27 @@ fn chroot(new_root: &Path) -> std::io::Result<()> {
     std::env::set_current_dir("/")?;
     Ok(())
 }
+
+#[derive(Debug)]
+struct Error {
+    message: String,
+    note: Option<String>,
+}
+impl<E: ToString> From<E> for Error {
+    fn from(value: E) -> Self {
+        Self {
+            message: value.to_string(),
+            note: None,
+        }
+    }
+}
+
+#[macro_export]
+macro_rules! error {
+    ($($all:tt)*) => {
+        $crate::Error {
+            message: ::rust_i18n::t!($($all)*).into(),
+            note: ::std::option::Option::None,
+        }
+    };
+}
diff --git a/cli/src/print.rs b/cli/src/print.rs
index d34daa7..95c0754 100644
--- a/cli/src/print.rs
+++ b/cli/src/print.rs
@@ -7,7 +7,7 @@ pub struct Cli {
     key: String,
 }
 
-pub fn main(cli: Cli) -> anyhow::Result<()> {
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
     let key: Vec<&str> = cli.key.split('.').collect();
     let result = match key.get(0).copied().unwrap() {
         "profile" => profile(&key[1..]),
diff --git a/cli/src/remove.rs b/cli/src/remove.rs
index 9b92fe4..5c2af02 100644
--- a/cli/src/remove.rs
+++ b/cli/src/remove.rs
@@ -1,4 +1,7 @@
-use crate::common::{print_list, yesno};
+use crate::{
+    common::{print_list, yesno},
+    error,
+};
 use anyhow::anyhow;
 use clap::Parser;
 use packie::{PackieBuilder, package::PkgSpec};
@@ -12,16 +15,16 @@ pub struct Cli {
     items: Vec<PkgSpec>,
 }
 
-pub fn main(cli: Cli) -> anyhow::Result<()> {
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
     let mut packie = PackieBuilder::new().build()?;
     let mut packages = Vec::with_capacity(cli.items.len());
     for pkgspec in cli.items {
         let mut found = packie.search_installation(&pkgspec)?;
         if found.is_empty() {
-            return Err(anyhow!("{}", t!("remove.package_not_found")));
+            return Err(error!("remove.package_not_found"));
         }
         if found.len() != 1 {
-            return Err(anyhow!("{}", t!("remove.pkgspec_not_unique")));
+            return Err(error!("remove.pkgspec_not_unique"));
         }
         packages.push(found.remove(0));
     }
diff --git a/cli/src/repo_admin.rs b/cli/src/repo_admin.rs
index 473bb95..b3e8876 100644
--- a/cli/src/repo_admin.rs
+++ b/cli/src/repo_admin.rs
@@ -25,7 +25,7 @@ pub struct Cli {
     clone: Option<String>,
 }
 
-pub fn main(cli: Cli) -> anyhow::Result<()> {
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
     if let Some(clone) = cli.clone {
         let progress_bar = ProgressBar::new(0);
         RepoServeDir::clone(&clone.parse()?, &cli.repo, |pkg, url, sum, total| {
diff --git a/cli/src/select.rs b/cli/src/select.rs
new file mode 100644
index 0000000..c65cff4
--- /dev/null
+++ b/cli/src/select.rs
@@ -0,0 +1,69 @@
+use crate::error;
+use clap::Parser;
+use console::style;
+use dialoguer::Select;
+use packie::PackieBuilder;
+use rust_i18n::t;
+use std::path::PathBuf;
+
+#[derive(Debug, Parser)]
+pub struct Cli {
+    file: PathBuf,
+}
+
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
+    let mut packie = PackieBuilder::new().build()?;
+    let file = if cli.file.is_absolute() {
+        cli.file.clone()
+    } else {
+        std::env::current_dir()?.join(&cli.file)
+    };
+    let mut all_pkgs = Vec::with_capacity(1024);
+    let mut candidates = Vec::new();
+    packie.for_each_installation::<anyhow::Error>(|inst| {
+        all_pkgs.push(inst.pkg_manifest.pkg_ident());
+        Ok(())
+    })?;
+    for pkgident in all_pkgs {
+        let links = packie.links_of_pkg(&pkgident);
+        let Ok(links) = links.iter() else {
+            return Ok(());
+        };
+        if let Some(link) = links
+            .filter_map(|x| x.ok())
+            .find(|x| x.to == file.to_string_lossy())
+        {
+            candidates.push((pkgident, link));
+        }
+    }
+    if candidates.is_empty() {
+        return Err(crate::Error {
+            message: t!("select.empty_list").into(),
+            note: Some(t!("select.note_relative_path").into()),
+        });
+    }
+    let items = std::iter::once(t!("select.disabled").into())
+        .chain(candidates.iter().map(|x| x.0.to_string()))
+        .map(|x| style(x).green());
+    let choice = Select::new()
+        .with_prompt(t!("select.prompt_select_package"))
+        .items(items)
+        .interact()?;
+    if choice == 0 {
+        if let Err(err) = packie::link::remove(&file) {
+            if err.kind() == std::io::ErrorKind::InvalidData {
+                return Err(error!("select.not_a_link"));
+            }
+            if err.kind() == std::io::ErrorKind::NotFound {
+                return Ok(());
+            }
+            Err(err)?;
+        }
+        return Ok(());
+    }
+    let (pkgident, linkdes) = candidates.remove(choice - 1);
+    _ = packie::link::remove(&file);
+    _ = packie::link::deactivate_by_description(&mut packie, &pkgident, &linkdes);
+    packie::link::activate_by_description(&mut packie, &pkgident, &linkdes)?;
+    Ok(())
+}
diff --git a/cli/src/update.rs b/cli/src/update.rs
index f856d27..1908ddf 100644
--- a/cli/src/update.rs
+++ b/cli/src/update.rs
@@ -1,16 +1,22 @@
 use clap::Parser;
 use indicatif::ProgressBar;
 use packie::{PackieBuilder, repo::SyncEvent};
+use rust_i18n::t;
 
 #[derive(Debug, Parser)]
 pub struct Cli {}
 
-pub fn main(cli: Cli) -> anyhow::Result<()> {
+pub fn main(cli: Cli) -> Result<(), crate::Error> {
     let mut packie = PackieBuilder::new().build()?;
-    let progress_bar = ProgressBar::new(0);
+    let progress_bar =
+        ProgressBar::new(0).with_style(crate::common::progress_style_multidownload());
     packie
         .sync_repo()
         .on_event(|ev| match ev {
+            SyncEvent::BeginRepo(repo) => {
+                progress_bar.set_prefix(repo.clone());
+                progress_bar.println(t!("update.begin_repo", repo = repo));
+            }
             SyncEvent::Progress(progress) => {
                 progress_bar.set_length(progress.total_bytes);
                 progress_bar.set_position(progress.downloaded_bytes);
diff --git a/locales/libpackie/main.yml b/locales/libpackie/main.yml
index e37babb..f54c5a9 100644
--- a/locales/libpackie/main.yml
+++ b/locales/libpackie/main.yml
@@ -2,45 +2,60 @@ _version: 2
 common.CopyError:
     en: 'failed to copy from "%{src}" to "%{dst}": %{error}'
     zh-CN: '无法将 "%{src}" 复制到 "%{dst}"：%{error}'
+    ja: '"%{src}" から "%{dst}" へのコピーに失敗しました：%{error}'
 install.InstallError.Database:
     en: "local database error: %{error}"
     zh-CN: "本地数据库错误：%{error}"
+    ja: "ローカルデータベースエラー：%{error}"
 install.InstallError.NotFound:
     en: "item not found: %{item}"
     zh-CN: "找不到项目：%{item}"
+    ja: "項目が見つかりません：%{item}"
 install.InstallError.DependencyRing:
     en: "dependency ring detected"
     zh-CN: "检测到依赖环"
+    ja: "依存関係の循環が検出されました"
 remove.RemoveError.NotUniquePkgSpec:
     en: "not unique package spec"
     zh-CN: "指定的包范围匹配到了多个包"
+    ja: "パッケージ指定が一意ではありません"
 remove.RemoveError.Database:
     en: "local database error: %{error}"
     zh-CN: "本地数据库错误：%{error}"
+    ja: "ローカルデータベースエラー：%{error}"
 remove.RemoveError.NotFound:
     en: "package not found"
     zh-CN: "找不到包"
+    ja: "パッケージが見つかりません"
 remove.RemoveError.RemoveFiles:
     en: "failed to remove package files: %{error}"
     zh-CN: "无法删除包文件：%{error}"
+    ja: "パッケージファイルの削除に失敗しました：%{error}"
 install.InstallError.AlreadyInstalled:
     en: "package already installed"
     zh-CN: "此包已经安装"
+    ja: "パッケージはすでにインストールされています"
 repo.RepoError.Database:
     en: "repository database error: %{error}"
-    zh-CN: "软件仓库数据库错误：%{error}"
+    zh-CN: "软件包仓库数据库错误：%{error}"
+    ja: "リポジトリデータベースエラー：%{error}"
 repo.RepoError.NoSuchRepo:
     en: "no such repository"
     zh-CN: "找不到仓库"
+    ja: "指定されたリポジトリが存在しません"
 repo.RepoError.NoSuchPackage:
     en: "no such package"
     zh-CN: "找不到包"
+    ja: "指定されたパッケージが存在しません"
 repo.RepoError.AllTriesFailed:
     en: "all tries failed"
     zh-CN: "所有尝试均失败"
+    ja: "すべての試行に失敗しました"
 repo.download.DownloadError.Checksum:
     en: "checksum failed"
     zh-CN: "文件完整性检查失败"
+    ja: "チェックサム検証に失敗しました"
 BuildPackieError.Lock:
     en: "failed to lock packie database: %{error}"
     zh-CN: "无法锁定 Packie 数据库：%{error}"
+    ja: "Packie データベースのロックに失敗しました：%{error}"
diff --git a/locales/packie-cli/main.yml b/locales/packie-cli/main.yml
index f23fc75..d515940 100644
--- a/locales/packie-cli/main.yml
+++ b/locales/packie-cli/main.yml
@@ -2,72 +2,164 @@ _version: 2
 main.error:
     en: "error: %{error}"
     zh-CN: "错误：%{error}"
+    ja: "エラー：%{error}"
+main.note:
+    en: "note: %{note}"
+    zh-CN: "备注：%{note}"
+    ja: "備考：%{note}"
+update.begin_repo:
+    en: "Synchronizing repository \"%{repo}\"..."
+    zh-CN: "正在同步软件包仓库 \"%{repo}\"..."
+    ja: "リポジトリ \"%{repo}\" を同期中..."
 install.prompt_to_install:
     en: "The following packages are to be installed:"
     zh-CN: "将要安装如下的包："
+    ja: "以下のパッケージをインストールします："
 install.download_size:
     en: "Download size: %{size}"
     zh-CN: "下载体积：%{size}"
+    ja: "ダウンロードサイズ：%{size}"
 install.installed_size:
     en: "Installed size: %{size}"
     zh-CN: "安装体积：%{size}"
+    ja: "インストール後サイズ：%{size}"
 install.confirm_installation:
     en: "Confirm to install?"
     zh-CN: "确认安装？"
+    ja: "インストールを続行しますか？"
 install.aborting:
     en: "Aborting."
     zh-CN: "中止。"
+    ja: "中止します。"
+install.no_package_to_install:
+    en: "No packages to install."
+    zh-CN: "没有要安装的包。"
+    ja: "インストールするパッケージがありません。"
 info.no_package_found:
     en: "The specified package was not found."
     zh-CN: "找不到指定的包。"
-info.pkgspec_not_unique:
+    ja: "指定されたパッケージが見つかりません。"
+info.error_pkgspec_not_unique:
     en: "The specified package spec was not unique."
     zh-CN: "指定的包规范匹配了多个包。"
+    ja: "指定されたパッケージ指定が複数のパッケージに一致しました。"
+info.note_pkgspec_not_unique:
+    en: "The following packages were matched:"
+    zh-CN: "匹配到了下面的包："
+    ja: "以下のパッケージが一致しました："
 info.print_pkgmanifest.name:
     en: "Package name"
     zh-CN: "包名"
+    ja: "パッケージ名"
 info.print_pkgmanifest.version:
     en: "Package version"
     zh-CN: "版本"
+    ja: "バージョン"
 info.print_pkgmanifest.arch:
     en: "Package architecture"
     zh-CN: "架构"
+    ja: "アーキテクチャ"
 info.print_pkgmanifest.dependencies:
     en: "Dependencies"
     zh-CN: "依赖"
+    ja: "依存関係"
 info.print_pkgmanifest.recommendations:
     en: "Recommendations"
     zh-CN: "建议安装"
+    ja: "推奨パッケージ"
 info.print_pkgmanifest.description:
     en: "Description"
     zh-CN: "描述"
+    ja: "説明"
 info.print_install_misc.install_pkgspec:
     en: "Install package spec"
     zh-CN: "安装请求"
+    ja: "インストール要求"
 info.print_install_misc.installed_size:
     en: "Installed size"
     zh-CN: "安装后大小"
+    ja: "インストール後サイズ"
 info.print_install_misc.install_date:
     en: "Install date"
     zh-CN: "安装日期"
+    ja: "インストール日時"
 remove.package_not_found:
     en: "The specified package was not found."
     zh-CN: "找不到指定的包。"
+    ja: "指定されたパッケージが見つかりません。"
 remove.pkgspec_not_unique:
     en: "The specified package spec was not unique."
     zh-CN: "指定的包规范匹配了多个包。"
+    ja: "指定されたパッケージ指定が複数のパッケージに一致しました。"
 remove.action_failure:
     en: "Failed to remove the specified package: %{error}"
     zh-CN: "无法移除指定的包：%{error}"
+    ja: "指定されたパッケージの削除に失敗しました：%{error}"
 remove.prompt_to_remove:
     en: "The following packages are to be removed:"
     zh-CN: "将要移除下面的包："
+    ja: "以下のパッケージを削除します："
 remove.confirm_removal:
     en: "Confirm to remove?"
     zh-CN: "确认移除？"
+    ja: "削除を続行しますか？"
 remove.aborting:
     en: "Aborting."
     zh-CN: "中止。"
+    ja: "中止します。"
 remove.action_hint:
     en: "Removing package %{package} ..."
     zh-CN: "正在移除包 %{package} ..."
+    ja: "パッケージ %{package} を削除中 ..."
+common.progress_style.speed:
+    en: "Speed: "
+    zh-CN: "速度："
+    ja: "速度："
+common.progress_style.current:
+    en: "Current: "
+    zh-CN: "已下载："
+    ja: "現在："
+common.progress_style.total:
+    en: "Total: "
+    zh-CN: "总共："
+    ja: "合計："
+common.progress_style.eta:
+    en: "ETA: "
+    zh-CN: "剩余时间："
+    ja: "残り時間："
+clean.warn_repos_dir:
+    en: "warning: failed to read repository cache directory: %{error}"
+    zh-CN: "警告：无法读取软件包仓库缓存目录：%{error}"
+    ja: "警告：リポジトリキャッシュディレクトリの読み取りに失敗しました：%{error}"
+clean.warn_repo_dir:
+    en: "warning: failed to read cache directory of repository \"%{name}\": %{error}"
+    zh-CN: "警告：无法读取软件包仓库 \"%{name}\" 的缓存目录：%{error}"
+    ja: "警告：リポジトリ \"%{name}\" のキャッシュディレクトリの読み取りに失敗しました：%{error}"
+clean.info_remove_file:
+    en: "Removing file \"%{path}\"."
+    zh-CN: "正在删除文件 \"%{path}\"。"
+    ja: "ファイル \"%{path}\" を削除中。"
+clean.warn_remove_file:
+    en: "warning: failed to remove file \"%{path}\": %{error}"
+    zh-CN: "警告：无法删除文件 \"%{path}\"：%{error}"
+    ja: "警告：ファイル \"%{path}\" の削除に失敗しました：%{error}"
+select.prompt_select_package:
+    en: "Select the package to use for the link"
+    zh-CN: "选择要为此链接使用的包"
+    ja: "リンクに使用するパッケージを選択してください"
+select.empty_list:
+    en: "No package provided the given link"
+    zh-CN: "没有包提供要求的链接"
+    ja: "指定されたリンクを提供するパッケージはありません"
+select.note_relative_path:
+    en: "A relative path is specified, and Packie resolves path based on your current directory. If this is not expected, provide an absolute path instead."
+    zh-CN: "指定了相对路径，Packie 会根据您当前目录解析路径。如果不符合预期，请改用绝对路径。"
+    ja: "相対パスが指定されています。Packieはカレントディレクトリに基づいてパスを解決します。意図と異なる場合は、絶対パスを指定してください。"
+select.disabled:
+    en: "Disabled"
+    zh-CN: "禁用"
+    ja: "無効"
+select.not_a_link:
+    en: "The existing file is not a link managed by Packie. Please remove it manually."
+    zh-CN: "已存在的文件不是一个被 Packie 管理的链接。请手动删除该文件。"
+    ja: "既存のファイルはPackieで管理されているリンクではありません。手動で削除してください。"
diff --git a/src/common/fs.rs b/src/common/fs.rs
index 88f0bf5..bbb3e15 100644
--- a/src/common/fs.rs
+++ b/src/common/fs.rs
@@ -163,11 +163,13 @@ pub struct CopyError {
 
 #[cfg(target_family = "unix")]
 #[derive(Debug)]
-pub struct LockGuard(Option<nix::fcntl::Flock<std::fs::File>>);
+pub struct LockGuard {
+    _inner: Option<nix::fcntl::Flock<std::fs::File>>,
+}
 #[cfg(target_family = "unix")]
 impl LockGuard {
     pub fn noop() -> Self {
-        Self(None)
+        Self { _inner: None }
     }
 
     pub fn open(path: impl AsRef<Path>, nonblocking: bool) -> std::io::Result<Self> {
@@ -181,6 +183,6 @@ impl LockGuard {
             nix::fcntl::FlockArg::LockExclusive
         };
         let lock = nix::fcntl::Flock::lock(file, flags).map_err(|x| x.1)?;
-        Ok(Self(Some(lock)))
+        Ok(Self { _inner: Some(lock) })
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 417755c..39156cc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -32,6 +32,11 @@ impl Packie {
     pub fn profile(&self) -> &Profile {
         &self.profile
     }
+
+    /// Returns cache manager for the Packie instance.
+    pub fn cache(&self) -> &Cache {
+        &self.cache
+    }
 }
 
 #[derive(Debug, Clone)]
diff --git a/src/link.rs b/src/link.rs
index f07b769..4998cdd 100644
--- a/src/link.rs
+++ b/src/link.rs
@@ -6,6 +6,12 @@ use std::{
     path::{Path, PathBuf},
 };
 
+impl super::Packie {
+    pub fn links_of_pkg(&self, pkgident: &PkgIdent) -> LinksFile {
+        LinksFile(self.local_data.links_file(pkgident))
+    }
+}
+
 /// Iterator over link descriptions in a links file.
 #[derive(Debug)]
 pub struct LinksFile(pub PathBuf);
@@ -73,14 +79,27 @@ pub fn create(from: impl AsRef<Path>, to: impl AsRef<Path>) -> std::io::Result<(
     Ok(())
 }
 
+/// Tries to remove a link at a given path. Also removes all its parent directories if they become empty after
+/// this deletion.
+///
+/// Note that this is not an atomic operation. Take care of TOCTOU and race condition.
+///
+/// # Errors
+/// It would return an standard library IO error in given error kind:
+///
+/// - `NotFound`: The file could not be located.
+/// - `InvalidData`: The file is not a link.
 pub fn remove(path: impl Into<PathBuf>) -> std::io::Result<()> {
     let mut path = path.into();
+    if !path.exists() {
+        return Err(std::io::ErrorKind::NotFound.into());
+    }
     if std::fs::read_link(&path).is_err() {
         return Err(std::io::ErrorKind::InvalidData.into());
     }
     std::fs::remove_file(&path)?;
     while path.pop() {
-        _ = std::fs::remove_dir(&path)?;
+        _ = std::fs::remove_dir(&path);
     }
     Ok(())
 }
diff --git a/src/local.rs b/src/local.rs
index 462af2e..3452c95 100644
--- a/src/local.rs
+++ b/src/local.rs
@@ -38,6 +38,13 @@ impl super::Packie {
             .unique_by(|x| x.pkg_manifest.pkg_ident())
             .collect())
     }
+
+    pub fn for_each_installation<E: From<rusqlite::Error>>(
+        &mut self,
+        f: impl FnMut(Installation) -> Result<(), E>,
+    ) -> Result<(), E> {
+        self.local_db.for_each_installation(f)
+    }
 }
 
 #[derive(Debug)]
@@ -199,6 +206,17 @@ CREATE TABLE IF NOT EXISTS "abspkg"(
         Ok(abspkg)
     }
 
+    pub fn for_each_installation<E: From<rusqlite::Error>>(
+        &mut self,
+        mut f: impl FnMut(Installation) -> Result<(), E>,
+    ) -> Result<(), E> {
+        let mut stmt = self.0.prepare_cached("SELECT * FROM \"installation\"")?;
+        for i in stmt.query_map(params![], map_installation)? {
+            f(i?)?;
+        }
+        Ok(())
+    }
+
     pub fn remove_installation(&mut self, pkg_ident: &PkgIdent) -> rusqlite::Result<bool> {
         self
             .0
diff --git a/src/package.rs b/src/package.rs
index 8809b3d..1151df4 100644
--- a/src/package.rs
+++ b/src/package.rs
@@ -152,6 +152,14 @@ impl FromStr for PkgSpec {
     type Err = crate::version::VersionError;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if let Ok(pkgident) = PkgIdent::from_str(s) {
+            return Ok(Self {
+                name: pkgident.name,
+                version: VersionFilter::Eq(pkgident.version),
+                arch: Some(pkgident.arch),
+            });
+        }
+
         let s = s.trim();
         let mut name = String::new();
         let mut version = None;
diff --git a/src/repo/download.rs b/src/repo/download.rs
index 8775d38..7a18713 100644
--- a/src/repo/download.rs
+++ b/src/repo/download.rs
@@ -10,6 +10,7 @@ pub struct Download<P> {
     to: PathBuf,
     on_progress: P,
     no_existence_check: bool,
+    checksum_required: Option<String>,
 }
 impl Download<fn(u64, u64)> {
     pub fn new(from: String, to: PathBuf) -> Self {
@@ -18,6 +19,7 @@ impl Download<fn(u64, u64)> {
             to,
             no_existence_check: false,
             on_progress: |_, _| (),
+            checksum_required: None,
         }
     }
 }
@@ -28,6 +30,7 @@ impl<P> Download<P> {
             to: self.to,
             no_existence_check: self.no_existence_check,
             on_progress,
+            checksum_required: self.checksum_required,
         }
     }
 
@@ -35,6 +38,11 @@ impl<P> Download<P> {
         self.no_existence_check = true;
         self
     }
+
+    pub fn checksum_required(mut self, val: String) -> Self {
+        self.checksum_required = Some(val);
+        self
+    }
 }
 impl<P: FnMut(u64, u64)> Download<P> {
     pub fn run(&mut self) -> Result<(), DownloadError> {
@@ -77,6 +85,16 @@ impl<P: FnMut(u64, u64)> Download<P> {
             sum += len as u64;
             (self.on_progress)(sum, total);
         }
+
+        if let Some(expected) = self.checksum_required.as_ref() {
+            let verified =
+                crate::common::checksum::verify_file(&temp_file_path, expected).unwrap_or_default();
+            if !verified {
+                _ = std::fs::remove_file(&temp_file_path);
+                return Err(DownloadError::Checksum);
+            }
+        }
+
         std::fs::rename(temp_file_path, &self.to).map_err(DownloadError::Filesystem)?;
 
         Ok(())
diff --git a/src/repo/mod.rs b/src/repo/mod.rs
index 0a4bab7..888dd78 100644
--- a/src/repo/mod.rs
+++ b/src/repo/mod.rs
@@ -3,9 +3,6 @@ mod serve;
 
 #[doc(inline)]
 pub use download::DownloadError;
-
-use itertools::Itertools;
-use rustc_hash::FxHashMap;
 #[doc(inline)]
 pub use serve::RepoServeDir;
 
@@ -14,8 +11,10 @@ use crate::{
     package::{AbsPkgIdent, PkgIdent, PkgManifest, PkgSpec},
 };
 use download::Download;
+use itertools::Itertools;
 use rusqlite::{OpenFlags, Row, params};
 use rust_i18n::t;
+use rustc_hash::FxHashMap;
 use serde::{Deserialize, Serialize};
 use std::path::{Path, PathBuf};
 use url::Url;
@@ -66,6 +65,7 @@ impl super::Packie {
                 .on_progress(|sum, total| {
                     on_event(DownloadPackageEvent::Progress(repo_url.clone(), sum, total))
                 })
+                .checksum_required(repo_package.checksum.clone())
                 .run();
             if let Err(err) = download_result {
                 on_event(DownloadPackageEvent::Error(
@@ -74,16 +74,6 @@ impl super::Packie {
                 ));
                 continue;
             }
-            let checksum_passed =
-                crate::common::checksum::verify_file(&download_path, &repo_package.checksum)
-                    .unwrap_or_default();
-            if !checksum_passed {
-                on_event(DownloadPackageEvent::Error(
-                    download_url.clone(),
-                    RepoError::Download(DownloadError::Checksum),
-                ));
-                continue;
-            }
             return Ok(download_path);
         }
 
@@ -304,6 +294,7 @@ impl<E: FnMut(SyncEvent)> SyncSession<'_, E> {
                 self.raise_error(Some(repo_name), None, RepoError::NoSuchRepo);
                 continue;
             };
+            (self.on_event)(SyncEvent::BeginRepo(repo_name.clone()));
             for url in repo.urls() {
                 match self.sync_url(&repo_name, &url) {
                     Ok(()) => break,
@@ -351,6 +342,7 @@ impl<E: FnMut(SyncEvent)> SyncSession<'_, E> {
 /// An event during running [`SyncSession`], which may report progress changes or errors.
 #[derive(Debug)]
 pub enum SyncEvent {
+    BeginRepo(String),
     Progress(SyncProgress),
     Error(Option<String>, Option<Url>, RepoError),
 }