150命令之線上查詢及幫助命令
阿新 • • 發佈:2017-11-10
last pri ons bash mysq ast see escape ext
150命令之線上查詢及幫助命令
man
查詢命令的幫助 man + 命令
- NAME
- ???????ls - list directory contents 命令+命令簡單說明
- ?
- SYNOPSIS
- ???????ls [OPTION]... [FILE]... 命令如何使用 名的格式
- ?
- DESCRIPTION 命令的詳細說明
- ???????List information about the FILEs (the current directory by default). Sort entries alphabetically if
- ???????nor --sort.
- ?
- ???????Mandatory arguments to long options are mandatory for short options too.
- ?
- ???????-a, --all 命令的參數
- ??????????????do not ignore entries starting with .
- ?
- ???????-A, --almost-all
- ??????????????do not list implied . and ..
- ?
- ???????--author
- ??????????????with -l, print the author of each file
- ?
- ???????-b, --escape
- ??????????????print octal escapes for nongraphic characters
中文查詢man 命令 http://man.linuxde.net/
?
--help
help跟man相同 比man簡潔
- [root@mysql ~]# ls --help
- Usage: ls [OPTION]... [FILE]...
- List information about the FILEs (the current directory by default
- Sort entries alphabetically if none of -cftuvSUX nor --sort.
- ?
- Mandatory arguments to long options are mandatory for short options too.
- ??-a, --all do not ignore entries starting with .
- ??-A, --almost-all do not list implied . and ..
- ??????--author with -l, print the author of each file
- ??-b, --escape print octal escapes for nongraphic characters
- ??????--block-size=SIZE use SIZE-byte blocks. See SIZE format below
- ??-B, --ignore-backups do not list implied entries ending with ~
- ??-c with -lt: sort by, and show, ctime (time of last
- ???????????????????????????????modification of file status information)
- ???????????????????????????????with -l: show ctime and sort by name
- ???????????????????????????????otherwise: sort by ctime
bash 中用的命令 man 查不到 但是—help能查到
- [root@mysql ~]# alias --help
- bash: alias: --: invalid option
- alias: usage: alias [-p] [name[=value] ... ]
150命令之線上查詢及幫助命令