Linux tac 倒序查看文本内容
Linux About 985 words说明
tac
是cat
的倒序。
- cat:Concatenate FILE(s), or standard input, to standard output.
- tac: Write each FILE to standard output, last line first.
应用
查找请求日志时,从底部找到最新的一个请求。
tac info.log | grep 'keywords' -m 1
帮助文档
Usage: tac [OPTION]... [FILE]...
Write each FILE to standard output, last line first.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-b, --before attach the separator before instead of after
-r, --regex interpret the separator as a regular expression
-s, --separator=STRING use STRING as the separator instead of newline
--help display this help and exit
--version output version information and exit
Report tac bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info coreutils 'tac invocation'
Views: 3,664 · Posted: 2019-08-23
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