命令列樂趣：嘲諷輸錯 Bash 命令的使用者 | Linux 中國

你可以透過配置 sudo 命令去嘲諷輸入錯誤密碼的使用者。但是現在，當使用者在 shell 輸錯命令時，就能嘲諷他了（濫用？）。

你好 bash-insulter

來自 Github 頁面：

當使用者鍵入錯誤命令，隨機嘲諷。它使用了一個 bash4.x. 版本的全新內建錯誤處理函式，叫 command_not_found_handle。

安裝

鍵入下列 git 命令克隆一個倉庫：

git clone https://github.com/hkbakke/bash-insulter.git bash-insulter

示例輸出：

Cloning into 'bash-insulter'...
remote: Counting objects: 52, done.
remote: Compressing objects: 100% (49/49), done.
remote: Total 52 (delta 12), reused 12 (delta 2), pack-reused 0
Unpacking objects: 100% (52/52), done.

用文字編輯器，比如說使用 vi，編輯你的 ~/.bashrc 或者 /etc/bash.bashrc 檔案：

$ vi ~/.bashrc

在其後追加這一行（具體瞭解請檢視 if..else..fi 宣告[1] 和 source 命令[2]）：

if [ -f $HOME/bash-insulter/src/bash.command-not-found ]; then
    source $HOME/bash-insulter/src/bash.command-not-found
fi

儲存並關閉檔案。重新登入，如果不想退出賬號也可以手動執行它：

$ . $HOME/bash-insulter/src/bash.command-not-found

如何使用它？

嘗試鍵入一些無效命令：

$ ifconfigs
$ dates

示例輸出:

一個有趣的 bash 鉤子功能，嘲諷輸入了錯誤命令的你。

自定義

你需要編輯 $HOME/bash-insulter/src/bash.command-not-found：

$ vi $HOME/bash-insulter/src/bash.command-not-found

示例程式碼：

command_not_found_handle () {
    local INSULTS=(
        "Boooo!"
        "Don't you know anything?"
        "RTFM!"
        "Hahaha, n00b!"
        "Wow! That was impressively wrong!"
        "What are you doing??"
        "Pathetic"
        "...and this is the best you can do??"
        "The worst one today!"
        "n00b alert!"
        "Your application for reduced salary has been sent!"
        "lol"
        "u suk"
        "lol... plz"
        "plz uninstall"
        "And the Darwin Award goes to.... ${USER}!"
        "ERROR_INCOMPETENT_USER"
        "Incompetence is also competence"
        "Bad."
        "Fake it till you make it!"
        "What is this...? Amateur hour!?"
        "Come on! You can do it!"
        "Nice try."
        "What if... you type an actual command the next time!"
        "What if I told you... it is possible to type valid commands."
        "Y u no speak computer???"
        "This is not Windows"
        "Perhaps you should leave the command line alone..."
        "Please step away from the keyboard!"
        "error code: 1D10T"
        "ACHTUNG! ALLES TURISTEN UND NONTEKNISCHEN LOOKENPEEPERS! DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK, BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKEN. IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS. ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN."
        "Pro tip: type a valid command!"
    )
    # 設定“隨機”種子發生器 
    RANDOM=$(date +%s%N)
    VALUE=$((${RANDOM}%2))
    if [[ ${VALUE} -lt 1 ]]; then
        printf "\n  $(tput bold)$(tput setaf 1)$(shuf -n 1 -e "${INSULTS[@]}")$(tput sgr0)\n\n"
    fi
    echo "-bash: $1: command not found"
    # 無效命令，常規傳回已存在的程式碼
    return 127
}

$ sudo visudo

Defaults insults

Defaults !lecture,tty_tickets,!fqdn,insults

Defaults    env_reset
Defaults    mail_badpass
Defaults    secure_path = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
## If set, sudo will insult users when they enter an incorrect password. ##
Defaults    insults
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root ALL = (ALL:ALL) ALL
# Members of the admin group may gain root privileges
% admin ALL = (ALL) ALL   
# Allow members of group sudo to execute any command
% sudo ALL = (ALL:ALL) ALL   
# See sudoers(5) for more information on "#include" directives:
#includedir /etc/sudoers.d

$ sudo -k # 清除快取，從頭開始
$ sudo ls /root/
$ sudo -i

$ sl