Linux文本处理工具

                                           作者:尹正杰

版权声明:原创作品,谢绝转载!否则将追究法律责任。

 

 

一.文本文件查看相关命令

1>.查看cat命令的帮助信息

[root@node101.yinzhengjie.org.cn ~]# cat --help
Usage: cat [OPTION]... [FILE]...
Concatenate FILE(s), or standard input, to standard output.

  -A, --show-all           equivalent to -vET
  -b, --number-nonblank    number nonempty output lines, overrides -n
  -e                       equivalent to -vE
  -E, --show-ends          display $ at end of each line
  -n, --number             number all output lines
  -s, --squeeze-blank      suppress repeated empty output lines
  -t                       equivalent to -vT
  -T, --show-tabs          display TAB characters as ^I
  -u                       (ignored)
  -v, --show-nonprinting   use ^ and M- notation, except for LFD and TAB
      --help     display this help and exit
      --version  output version information and exit

With no FILE, or when FILE is -, read standard input.

Examples:
  cat f - g  Output f's contents, then standard input, then g's contents.
  cat        Copy standard input to standard output.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
For complete documentation, run: info coreutils 'cat invocation'
[root@node101.yinzhengjie.org.cn ~]# 

2>.cat命令常用参数

[root@node101.yinzhengjie.org.cn ~]# cat f1.txt 
1

2

3
4

5
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# cat -n f1.txt       #对文件原每行内容加行号
     1  1
     2
     3  2
     4
     5  3
     6  4
     7
     8  5
[root@node101.yinzhengjie.org.cn ~]# 
[root@node101.yinzhengjie.org.cn ~]# cat -n f1.txt          #对文件原每行内容加行号

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