^ # 锚定行的开始 如:'^grep'匹配所有以grep开头的行。 $ # 锚定行的结束 如:'grep$'匹配所有以grep结尾的行。 . # 匹配一个非换行符的字符 如:'gr.p'匹配gr后接一个任意字符,然后是p。* # 匹配零个或多个先前字符 如:'*grep'匹配所有一个或多个空格后紧跟grep的行。 .*# 一起用代表任意字符。 [] # 匹配一个指定范围
grep'word'filenamegrep'string1 string2'filenamecatotherfile |grep'something'command|grep'something'commandoption1 |grep'data'grep--color'data'fileName 基本的用法 在某个文件里搜索error字符串 $ grep "error" log.txt 忽略大小写搜索(-i) $ grep -i "ErroR" log.txt 所有子目录下的搜索(-r) $ ...
You should get a grip on the Linux grep command. This is part of the on-going 15 Examples series, where 15 detailed examples will be provided for a specific command or functionality. Earlier we discussed 15 practical examples for Linux find command, Linux command line history and mysqladmin ...
we piped that output togrep –ipython, which simple states “go to grep and filter out and return everything with ‘python’ in it.” The–ioption is there to ignore-case, asgrepis case-sensitive. Using the–ioption is a good habit of getting into, unless of course you are trying to...
Grep command examples Grep is one of the most used commands in Unix (or Linux). The name “grep” means “general regular expression parser” The grep command is used to search for text strings or regular expressions within one or more files. It can be very useful in your daily ...
https://www.geeksforgeeks.org/awk-command-unixlinux-examples/ Combining what we just learned $ grep xval example.dat|awk '{ print $3, $6 }'|sed 's/,//' >output.txt This made Date 3/11/2020 xval = 5.88, yval = 0.25
和grep MemFree /proc/meminfo查看内存使用量与交换区使用量:free -m查看各分区使用情况(disk free):df -h查看指定目录大小(disk usage, 跟df 功能有些类似):du -sh xxx(目录名), 或者du -hd 2 xxx查看占用磁盘空间最大的6个文件:du -hsx * |sort -rh |head -6 查看虚拟内存:vmstat查看内存与cpu:...
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$ which grep 5. type type命令其实不能算查找命令,它是用来区分某个命令到底是由shell自带的,还是由shell外部的独立二进制文件提供的。如果一个命令是外部命令,那么使用-p参数,会显示该命令的路径,相当于which命令。 type命令的使用实例: $ type cd
Code Issues Pull requests Handy commands for Linux linux shell links process signals ps top vi grep-command linuxcommand useradmin hardlink chown ls-command softlink filtercommands filepermissions findcommand groupadmin Updated Jan 31, 2021 jk...