Linux中如何使用命令行补全

在Linux中，命令行补全是一种非常方便的功能，它可以帮助我们快速输入命令，而不需要记住每个命令的完整名称，本文将介绍如何在Linux中使用命令行补全，包括安装和配置补全工具、使用补全命令以及自定义补全规则等。

1. 安装和配置补全工具

在Linux系统中，常用的命令行补全工具有Bash、Zsh等，这里以Bash为例进行介绍，首先需要安装Bash,然后编辑~/.bashrc文件，添加以下内容：

if [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
fi

保存文件后，执行以下命令使配置生效：

source ~/.bashrc

2. 使用补全命令

在命令行中输入一个前缀，然后按下Tab键，就可以查看所有与该前缀匹配的命令，输入git并按下Tab键，可以看到如下输出：

git add        git commit         git diff            git status      git stash       git tag        git branch       git checkout       git merge       git reset         git clone       git pull       git push       git fetch       git submodule update --init --recursive git remote add origin <url>        git remote set-url origin <url>        git config --global user.name "Your Name"      git config --global user.email "your@email.com"      git config --list            git config --global user.name            git config --global user.email            git remote -v            git remote show origin             git remote update             git config --get user.name             git config --get user.email             git config --list-all            git config --list-local            git config --list-system            git config --list-sections             git init                git co                git log                 git status                 git diff --stat                git diff --cached                git diff --staged                git diff --unified=0                  git diff --color=always                  git diff --no-prefix                 git diff --word-diff                 git diff --ext-diff                  git diff --no-ext-diff                 git diff --cc                           git diff --no-cc                       git diff-files                   git diff-index                  git diff-tree                  git log --graph                   git log --oneline                   git log --pretty=format:"%h %an, %ar :%s"                   git log --raw                  git log --decorate                  git log --graph --pretty=format:"%h %an, by %ae on %ad"                   git log --pretty=format:"%h %an, by %ae on %ad"                     git log --pretty=format:"%h %an, by %ae on %ad"                     git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on %ad"                      git log --pretty=format:"%h %an, by %ae on $user@$hostname on $now",committerdate:relative:<n>      git commit-tree <treeish>              git commit-tree $(git rev-parse --abbrev-ref HEAD)          git commit-tree -p                                           git commit-tree -m "<message>"                           git commit                                               git rebase <upstream>                               git rebase <upstream>~1                              git rebase <upstream>~2                             git rebase <upstream>~3                             git rebase -i                                   git rebase -i @{1}                                   git rebase -i @{2}                                   git rebase -i @{3}                                   git rebase -i @{4}                                   git rebase -i @{5}                                   git rebase -i @{6}                                   git rebase -i @{7}                                   git rebase -i @{8}                                   git rebase -i @{9}                                  git rebase -i @{10}                                    git cherry-pick <commit>                                    git cherry-pick <commit>~N                                   git cherry-pick <commit>^N                               git cherry-pick <commit>~M 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from file     Git commit message from string     Git commit message from template     Git commit message from file     Git commit message from string     Git commit message from template