Shell

Shift can be used to move position parameters to the left.Shell's name is $The first argument is $Second argument $Nth parameter $nAll parameters $@ or $*Number of parameters $# Shift default is shift 1Take the example below: Copy Code code

Take a look at the contents of the original file: Copy Code code as follows: Root@localhost ~]# Cat File.txt Hello World A:b:c-h-N A:b:c-h-N SED deletes related rows based on conditions: Copy Code code as follows:

Copy Code code as follows: #!/bin/bash #****************************************************************# # SCRIPTNAME:PM # AUTHOR:OSDBA # Create Date:2010-01-31 # Modify Author: # Modify Date:2010-01-31 # Function:show processes Memory

Components used to query IP addresses Copy Code code as follows: wget http://rfyiamcool.googlecode.com/files/nali-0.1.tar.gz Tar zxvf nali-0.1.tar.gz CD nali-0.1 ./configure && make && make install The steps and Nginx are

The problem is as follows Input: Pointer to node C in list A->b->c->d->e Output: no return value, but new list becomes a->b->d->e Answer: Thought for a long time did not think out, read the hint to know the solution. Here's a little trick. To remove

1. A streamlined script for automating the deployment of systems, with the main function of cleaning up all directory logs 2. According to the given log directory, delete time combined with crontab to clean the log, clean up after completion, after

Linux hardware devices in the/dev directory, the optical drive is one of them./dev/cdrom represents the optical drive, the method of mounting the optical drive is as follows (in root): Copy Code code as follows: Mkdir/mnt/cdrom

The core server ran a bunch of scripts, procedures, it is inevitable that sometimes zombie process, dead or alive in the occupied resources there, initially just wrote a keyword to kill the process of the Linux shell script, and later found that

Copy Code code as follows: #include using namespace Std; void Shellqin (int a[],int N) { int GAP=N/2; int i,j; for (; gap>0;gap=gap/2)//Set the initial gap, according to the Gap group, Gap in accordance with GAP/2 decline { After the

Not long ago I saw two interesting commands in the book--script and Srciptreplay, which can record a terminal session in a file, that is, we can create a command-line video tutorial through a terminal session, or we can share session files with

The script is mainly from the defined NTP server list to get the server address to synchronize, if the first unsuccessful, will continue to change the address to sync! Not perfect place also please point out! Copy Code code as follows: #

Copy Code code as follows: # Cat Doallslave.sh #!/bin/sh #code by Scpman #mail: scpman@live.com #blog: http://www.scpman.com #name: "Doallslave.sh" Helpinfo () { Echo-e ' \t\thelp View Help information ' Echo-e ' \t\t automatically do

Implementation method One #!/bin/bash logs_path= "/data/application/nginx/logs" pid_path= "/data/application/nginx/nginx.pid" Month= ' Date +%y-%m ' date= ' date +%y-%m-%d ' time= ' date +%h ' waittime=$ ( (24*60*60)) logcut () { CD $Logs

Question: Https://www.jinshuju.net/f/EGQL3D Language: Shell (Bash)Operation mode:SH num-game.sh digit 1 digit 2 Number 3If you do not want to use the method of passing numbers, you can modify num-game.sh line 9th tonum=$*Tonum= ' number 1 digit 2

Recently in the debugging server iptables, oneself made a timed turn off iptables, but at night home rarely open a computer, so can not go to start iptables, of course, you may say, why not cancel timed shutdown iptables, I can only say that

The main purpose is to restart the background of more important processes, if the use of killall-9 forced kill, may cause problems. such as database processes. The code is as follows: Copy Code code as follows: #!/bin/sh If [-Z "$"];

Shell Array Description: Copy Code code as follows: Array variable definition: $ arr= (1 3 6 8 2 5 9 0 7 4) Get first element by default $ echo $arr By subscript access, the second element of the array below, the shell array

Recently saw a group of people chatting to their server has recently been Hung horse, and then want to use a script to monitor the Web directory changes in real-time files, that is, the directory of additions and deletions to the corresponding log

This article describes the implementation of the core file automatic generation configuration method, the following steps: 1. Edit the Environment configuration file, let the shell start automatically set Ulimit Vi/etc/profile ulimit-c

Sometimes, because of the architectural design or other business itself characteristics, resulting in some applications using CPU is very uneven, so business processing concentrated on one CPU, while the other CPU idle sleep. Here is a simple