颠倒所输入的字符串
# a.txt
# abc
rev a.txt
> cbaascii方式终端查看图片
apt install aview imagemagick
asciiview some_pic.png -driver curses一辆火车通过终端，敲错ls的后果
apt install sl
slapt install libaa-bin
aafire终端字符雨特效
apt install cmatrix
cmatrix因式分解，对所给的数分解因式
apt install factor
factor 6
> 6: 2 3终端出现一只猫，跟着鼠标移动
apt install oneko
oneko对所输入的字符添加各种外形/边框
apt install boxes
echo "some_text" | boxes -d dog出现一双眼睛盯着你
apt install xeyes
xeyes匀速显示字符
apt install pv
echo "some text string test eeeee show on terminal." | pv -qL 10显示一些句子
apt install fortune
fortune终端上输出大号的ascii文字
apt install figlet
# /usr/share/figlet 字体文件
figlet -f big.flf some_text终端变成海洋馆
apt install asciiquarium
asciiquarium用ascii显示输入的字符
apt install cowsay
cowsay some_text
cowsay -f ghostbusters.cow some_text彩色输出ascii字符串
apt install toilet
toilet -F border -F gay -f mono12 some_text嗯，难以描述
apt install bb
bb彩色的cat
apt install lolcat
lolcat some_file.txt显示输入命令的用法示例
apt install cheat
cheat ls
> # Displays everything in the target directory
> ls path/to/the/target/directory
> # Displays everything including hidden files
> ls -a
> # Displays all files, along with the size (with unit suffixes) and timestamp
> ls -lh
> # Display files, sorted by size
> ls -S
> # Display directories only
> ls -d */
> # Display directories only, include hidden
> ls -d .*/ */