Shell

My configuration is the Linux, android4.2.2 SDK. The implementation details are in the code comments, and the variable name and echo content are part of the description. The main process is: 1. The simulator that detects whether the port is

Description: The subscript for an array in the shell defaults to the 0 start 1, put the string in the array, get its length Copy Code code as follows: #!/bin/bash Str= "A B--n D" Array= ($STR) length=${#array [@]} Echo

Code AUbuntu and CentOS Copy Code code as follows: Ubuntu: #!/bin/bash echo "IPADDR:" Read Line Echo $line Sed "s/address.*$/address=${line}/g"/etc/network/interfaces CentOS (not tested): #!/bin/bash echo "IPADDR:"

Copy Code code as follows: #!/bin/sh # Desc:setup Linux system security # AUTHOR:CORALZD # Powered by www.freebsdsystem.org # version 0.1.2 written by 2011.05.03 #account Setup Passwd-l XFS Passwd-l News Passwd-l NSCD Passwd-l Dbus

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Copy Code code as follows: #!/bin/bash if [!-f/tmp/down_count];then echo "0" > /tmp/down_count Fi Curl-i tomcat-host-o "/tmp/status" >/dev/null 2>1 Code= ' awk ' nr==1 {print $} '/tmp/status ' If ["$[code]"-ge];then

In the operational dimension scenario, we often need to match the IP address with a regular expression on the server. The shell, like other programming languages, can also use regular group captures, but you cannot capture groupings in the form of $

1. Preface Almost six months did not write a blog, deserted for a long time, the work of the chores too much, their own more and more lazy. In order to spur their own growth, or adhere to write a blog, record their growth. 2. Introduction to Shell

The real-time traffic of the NIC can be viewed through the Iptraf command, and the image is very intuitive. I'm going to look at the network traffic on the test server today. Copy Code code as follows: [Root@localhost ~]# iptraf-d eth0 -

First, the Apache log by day cutting Copy Code code as follows: Vi/etc/httpd/conf/httpd.conf ErrorLog "|rotatelogs/var/log/httpd/%y%m%derror_log 86400 480" Customlog "|rotatelogs/var/log/httpd/%y%m%daccess_log 86400" combined

To ensure that the PHP page runs in the background, write a monitoring script, assuming that the program exits unexpectedly, you can automatically restart. Shell Script/usr/local/scripts/receve.sh content: #!/bin/bash #funtion: Keep

The most recent script always needs to be computed, and every time awk is cumbersome, it encapsulates the subtraction of awk, and each time the direct source math.sh is invoked.There are some points to be pointed out so as not to forget in future

If you want to add a character after a variable, you can use the method: Copy Code code as follows: $value 1=home $value 2=${value1} "=" Echo $value 2 Add the string variable you want to add {}, and you need to put $ outside.The

Task ScheduleCrontab-l1 * * * */home/dongnan/sh/split.sh >>/home/dongnan/sh/cron.log 2>& Nginx Logls/var/log/nginx/20130730-access.log.gz 20130801-access.log.gz 20130803-access.log.gz20130730-error.log.gz 20130801-error.log.gz 20130803-error.log.gz2

1 Prepare the monitoring machineLinux system, normal server can, request:Install SSH client, if you want to send SMS, also need to prepare SMS cat and install Gnokii or Gammu 2 Edit ssh_config configuration file/etc/ssh/ssh_config configuration

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 #--

When the server pressure is larger, running very laborious time. We often do Site page optimization, will go to find those pages are more frequent, and more time-consuming. Find the addresses that are high and time-consuming, and the related

Copy Code code as follows: #include #include #include #include int main (int argc,char **argv) { int mode; int Mode_u; int mode_g; int mode_o; Char *path; if (argc{ printf ("%s \n", argv[0]);; Exit (0); }

1. The problem addressed When you need to enter many commands at once, for example, to remove files from multiple directories at once Copy Code code as follows: CD Dir1 RM file1.temp Cd.. /.. /dir2 RM-RF Dir3 When you

Demand I wrote this script two days ago when I met the need to extract a file in a 10-story folder. A file structure like the following: Copy Code code as follows: Dir1 ├──a │├──b ││└──file1 │└──file2 ├──c │└──d │├──e