Shell

Copy Code code as follows: #!/bin/sh # Get the first day of the quarter, the date interval to yesterday # link:www.jb51.net # DATE:2013/2/28 Day= ' date-d "1 days Ago" "+%y%m%d";year= ' expr substr ${day} 1 4 ';Month= ' Expr

Copy Code code as follows: #/bin/bash # History After #把以下代码直接粘贴到/etc/profile user_ip= ' who-u am I 2>/dev/null| awk ' {print $NF} ' |sed-e ' s/[()]//g ' Histdir=/var/log/.hist If [-Z $USER _ip] Then User_ip= ' hostname ' Fi if [!-D

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:

The company's recent server testing, the need to constantly adjust the system time, one or two is ok half, a little more points, on a variety of entanglements, the author of these several sets of the author is going crazy. Eldest brother: All speed

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

Copy Code code as follows: useradd.sh #!/bin/bashFor name in Tom Joy John Mark JamesDo Useradd $nameecho "Redhat" | passwd--stdin $nameDone OK, after the execution, the new user will be automatically created Tom, Joy, John, Mark, James,

Generation of dynamic libraries: 1,/*mysum.c*/ Copy Code code as follows: #include #include "src.h" int sum (int a,int b){return (A+B);} 2,/*mysum.h*/ Copy Code code as follows: #ifndef __src_h__ #

The content of this section:Keep the specified number of files remaining under the file system Example: Copy Code code as follows: #!/bin/bash #------------------------------- #Description: Back Up your files #site: Www.jb51.net #--

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

A: This script runs the machine, LinuxB: The machine that installs the JDK, Linux First, on machine A on which the script runs, determine that you can log on to machine B on the JDK by SSH without a password, and then you can run this script on a:

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: #

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

In a multiple-machine cluster environment, often faced with the modification of the configuration file after copying to multiple servers, the traditional implementation of the SCP is troublesome, so write the following shell script, you can copy the

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

The IP that lists the most visited times of the daycommand: Copy Code code as follows: Cut-d--F 1/usr/local/apache2/logs/access_log |uniq-c | Sort-rn | Head-20 Principle: Copy Code code as follows:        cut