导读 前面使用的命令,有几个用到了参数如ls -l, head -n 6等,需要注意的是命令跟参数之间要有空格。
获取可用命令行参数


终端运行man ls可以查看ls所有可用的参数,上下箭头翻页,按q退出查看。(man: manual, 手册)

ct@ehbio:~/data$ man ls
NAME
 ls - list directory contents
SYNOPSIS
 ls [OPTION]... [FILE]...

DESCRIPTION
 List  information  about  the  FILEs  (the current directory by default).
 Sort entries alphabetically if none of -cftuvSUX nor --sort is specified.

 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 C-style escapes for nongraphic characters
 ....
文件上下翻转和左右翻转

两个有意思的命令,tac: 文件翻转,第一行变为最后一行,第二行变为倒数第二行;rev每列反转,第一个字符变为最后一个字符,第二个字符变为倒数第二个字符。

ct@ehbio:~/data$ cat <  first
> second
> third
> END
third
second
first
ct@ehbio:~/data$ cat <  abcde
> xyz
> END
edcba
zyx

原文来自:http://blog.genesino.com/2017/06/bash1/#%E5%91%BD%E4%BB%A4%E8%BF%90%E8%A1%8C%E7%9B%91%E6%B5%8B

本文地址:https://www.linuxprobe.com/linux-learning-getting.html编辑:坑人小妖精,审核员:逄增宝

Linux命令大全:https://www.linuxcool.com/