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 ~]#