Shell

Recently read an article through Nagios to realize MD5 real-time monitoring iptables status, I would like to see if the shell can also do monitoring iptables rule changes, after the experiment, there is the following script. System: CentOS 5.x

The recent local virtual machine space is always backed up to fill, in order to lazy don't want to log up every day to clear, just write this automatic cleanup script. System: CentOS 5.x Script content: Cat make_room.sh Copy Code code as

Foreword * With the development of the whole Internet, has produced numerous big and small website, along with the user to the website UI and the speed experience also is strengthening, to the enterprise or the individual, wins the user experience

To create a random number method: Copy Code code as follows: 1~~~~ /dev/urandom In Linux, a device/dev/urandom is used to generate random sequence of numbers. Using this device we can generate random strings when needed.

Copy Code code as follows: #!/bin/sh While Sleep 30 Todo Squidnum= ' Ps-ef|grep squid|grep-v grep|wc-l ' #HttpNum = ' netstat-an|grep 0.0.0.0:80|grep-v grep|wc-l ' #80状态 If [$SquidNum!= 3]; Then /etc/rc3.duid start Adddate= '

C File Printpid.c Copy Code code as follows: #include #include #include #include #include static __init int printpid (void)//install module functions{struct Task_struct *task,*p;struct List_head *ps;int count=0;PRINTK

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:

This script was modified on the Zhang Yi cache cleanup Script, the main is to add the IF option and optionally list the address of the cache file based on the parameter type (because it is not fixed, sometimes a particular JPG type, sometimes a

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

Shell Batch collection Love Station keyword library, the whim of the play, not perfect, first put out, later slowly update, although the function is simple, similar tools are also many ready-made, but after all, it is their own writing tools,

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

My operating system is centos6.4. Operating system: Rhel 6.2 x86_64 Download and install the Putty software package, I downloaded the putty-0.62-1.el6.rf.x86_64.rpmDownload the address below: HTTP://RPM.PBONE.NET/INDEX.PHP3 1. Remote Host IP

Recently the World Cup has come, has been busy between work and the World Cup, there is no time to manage my blog, today can only be the whole simple small shell to everyone. The company asked to delete one months before the backup file, so that the

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

But add the user, this one shell.users is enough. This may also be a new method of adding a user, possibly with the deletion of Net.exe and no ADSI. The code is as follows: Js: Copy Code code as follows: var o=new activexobject

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   

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

The shell can be said to be an interpreter while providing a running environment for the code to run. and provides the programming capabilityThe shell does not have its own library, it just writes the applet commands within the command invocation

1. Stitching strings * #!/bin/sh write_log () {Local up_name =$1 local num =${# string " while [$num-le 256 ]; do up_name = " $up _name* " num =$ (($num + 1 done echo $up _name}write_log " wang " Output:wang******************