tac 命令详解 博客分类: Linux linuxOSUnix查看文件tac
Linux -- tac 查看文件内容
TAC(1) User Commands TAC(1)
NAME 名称
tac - concatenate and print files in reverse
连接文件,以相反的顺序打印文件内容
SYNOPSIS 大纲
tac [OPTION]... [FILE]...
DESCRIPTION 说明
Write each FILE to standard output, last line first. With no FILE, or when FILE is -, read standard input.
将每个文件以倒序的方式依次打印到标准输出设备上。如果没有指定文件,或文件占位符以'-'代替,则从标准输入设备读取。
Mandatory arguments to long options are mandatory for short options too.
对于长选项必须的参数,对于短选项也是必须的。
-b, --before
attach the separator before instead of after
在行前附加分隔符代替在行尾附加分隔符。
-r, --regex
interpret the separator as a regular expression
将分隔符作为正则表达式来解析。
-s, --separator=STRING
use STRING as the separator instead of newline
使用指定字符串代替换行作为分隔标志。
--help display this help and exit
显示帮助信息并退出。
--version
output version information and exit
显示版本信息并退出。
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report tac translation bugs to <http://translationproject.org/team/>
AUTHOR
Written by Jay Lepreau and David MacKenzie.
COPYRIGHT
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
rev(1)
The full documentation for tac is maintained as a Texinfo manual. If the info and tac programs are properly installed at your site, the command
info coreutils 'tac invocation'
should give you access to the complete manual.
tac的完整文档是以Texinfo手册形式维护的。如果info和tac程序都已经安装,那么执行命令:
info coreutils 'tac invocation'
应该会让你访问到整篇手册。
GNU coreutils 8.22 June 2014 TAC(1)