Shell

System: CentOS 5.xScript content: The code is as follows Copy Code Cat make_room.sh#!/bin/bash#size = ' Df-hp|grep/dev/mapper/volgroup00-logvol00|awk ' {print $} ' |cut-f 1-d ' G 'Size= ' Df-mp|grep/dev/mapper/volgroup00-

In Python, there are many modules that enable concurrent programming, such as threading, processing, Eventlet, and Stackless python. So how does it work for the shell? In fact, the principle is very simple, I used the method is:1. The tasks that

Every time you build a new SVN version of the library it's always a lot of fun, so write a section of the script to automate the process, the detailed code is as follows: The code is as follows Copy Code #!/bin/bash# by

The original script: The code is as follows Copy Code #!/bin/bashFile= "/root/newfile/"List= "/root/sqlbak"Ls-l $list/|awk ' {print $} ' |while read lineTodoCp-r $list/$line $fileDone Modified script:

Script content: The code is as follows Copy Code VI iptables-reset.sh#!/bin/bash#Powered by blog.slogra.comport= ' Iptables-vl|grep Ssh|awk ' {split ($NF, A, ":");p rint a[2]} ' |wc-l 'if [$port = 1];thenecho

The IF statement in the shell needs to make a regular judgment and check the grammatical records. The code is as follows Copy Code Datepattern= "^[0-9]{4}-[0-9]{1,2}-[0-9]{1,2}$"if [["$STARTDATE" =~ $DATEPATTERN]] && [[

Using the Linux shell is my daily basic work, but I often forget some useful shell commands and L tips. Of course, I can remember the order, but I'm not sure I can remember how to use it to perform a particular task. So I began to record these

Take. SVN example For example, if I want to delete all the. SVN directories under/data/web/, then execute the following command. The code is as follows Copy Code Cd/data/webFind. -type d-name ". SVN" |xargs RM-RVF

A date loop that is useful in processing some data that is stored by date. Especially testing and recording, deleting, reprocessing data. However, if you encounter a situation such as the span of a month, simply using a numerical cycle is not

Renamed a Web project, and then modified the Apache configuration to a new directory restart, the following error message appears: Shell-init:error Retrieving current Directory:getcwd:cannot access parent directories:no such file or directory

The most common source package downloaded from the network is. tar.gz package, and part of the. tar.bz2 Package To decompress is simple: . tar.gz Format Decompression command for TAR-ZXVPF xx.tar.gz. tar.bz2 Format Decompression command for

Part 1: ' Command ' This is the "command standard output as a function of standard input" method of operation, there are great drawbacks and unsafe places. disadvantage one: relatively old. disadvantage two: easy to confuse with single quotes.

Recently write script, need to intercept the path parameter that function passes in the script, discover the following more useful method, record below: File=/dir1/dir2/dir3/my.file.txt We can replace each of the different values with ${}: ${file#

Presumably, anyone who knows makefile knows that makefile can invoke a shell script. But when it's actually used, it's not that simple, and some ambiguous places can make you mad. If you don't believe it, you can take a look at a few examples,

Submit Process Related View file changes and new files Add new File git add Your_file_path //Add all Files git add * //Add a type of file Simple submission of files Submit all of your modified files and

See if there are any custom users (ordinary users) on your Linux system, and if so, how many are there?[email protected] ~]# cat 6.sh#/bin/bashN= ' awk-f: ' $3>=500{print '/etc/passwd |wc-l 'If [$n-gt 0];thenecho "$n Common users"Elseecho "No common

Nginx service startup script  The code is as follows:Copy code #! /Bin/sh# Chkconfig: 2345 55 25# Description: Startup script for nginx webserver on Debian. Place in/etc/init. d and# Run 'UPDATE-rc. d-f nginx defaults', or use the appropriate

Script#! /Bin/bash Cat/var/log/secure | awk '/Failed/{print $(NF-3 )} '| sort | uniq-c | awk' {print $2 "=" $1;} '>/root/black.txt # filter the ip addresses and times in the Failed status Cat/var/log/secure | awk '/Invalid user/{print $ NF}' | sort |

Note: Operating system: CentOS Web server: apache Problem: Search engine crawlers increase website access volume in a certain period of time. The server is under heavy pressure, the website access times out, and the page cannot be