date
: 查看当前日期和时间
cal
: 查看当前日历
free
: 查看内存使用情况
exit
: 退出 shell
cd -
: 返回上一工作目录
ls -a
: 显示所有子文件,包括隐藏文件
file
: 列出文件格式和属性信息
type 命令
: 显示命令的类型
which 命令
: 显示命令的可执行文件的位置
help 命令
: 显示命令的帮助文档
man 命令
: 显示命令的操作手册
apropos 字符串
: 显示与输入字符串字符相关的命令
pwdx 进程号
: 显示此进程号的当前工作目录
whatis 命令
: 显示命令的简要描述
info 命令
: 显示命令的信息条目
!!
: 重复上一条命令
ps
: 显示由当前终端控制的所有进程
命令 &
: 使命令进入后台运行
fg %
: 使命令进入前台运行
pstree
: 以树状结构列出进程表
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