Shell

These two days, because the work needs to do some of the process of work, look at some of the online examples, mostly through the way of pipeline files to achieve, and then think about it without so much trouble ... The following is a simple

If you need to write a section to interact with the user, and need to input some sensitive information (for example: User password, license, etc.), the direct use of printf+read, the user input information will be displayed on the screen, which is

For example, to split test= "AAA,BBB,CC cc,dd dd", you can Copy Code code as follows: arr=$ (Echo $test |tr "," \ n ") I can do that. Copy Code code as follows: old_ifs= $IFS Ifs= ', ' Arr= $test ifs= $OLD

When dealing with some data files on Linux, it is sometimes necessary to filter out the empty rows, and the various tools available in the system can accomplish this function. The usual introductions are as follows:1. grep Copy Code code as

Often need to statistics Apache site traffic based on the IP address, the most basic script. In descending order based on IP traffic: Copy Code code as follows: #!/bin/bash #Script_name: Access_count

This example describes the Jquery.fancybox.js usage of the jquery Pinball plug-in. Share to everyone for your reference, specific as follows: FancyBox is a jquery plug-in, powerful. Support to enlarge the picture to add shadow effect, for a group

First, we need to increase the user's ability to execute the script, that is, Copy Code code as follows: String cmdstring = "chmod a+x test.sh"; Process proc = Runtime.getruntime (). exec (cmdstring); Proc.waitfor (); Block until the

Objective Using the Shell The basic shell commands and mechanisms are described and explained below. First: Super Tools/terminals,xterms and Shells One, Super tool You've probably heard the argument that the command line (the Mommand lines) is

I. Overview 1. Product Overview: Awk is a programming language used to scan and process text and data under Linux/unix. Data can come from standard input, files, and pipelines. Awk represents the first letter of its author's surname, respectively.

First type: #!/bin/bash service vsftpd start &>/dev/null if [$-eq 0] Then echo "FTP is start" Else Service VSFTPD Start Fi The second type: #!/bin/bash read-p "Input your file name" file_name If [D-$file _name]//To determine whether 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

shell script automatically backs up the database 1. Writing Backup scriptsVI backup.sh#!/bin/bashdate=`date +%Y%m%d_%k%M`  mysqldump-uroot-p12345-h127.0.0.1 db | gzip >/home/ubuntu/root/db_$date.sql.gz2. Modify Script executable

The data flow redirection is used when adding logs to memcached, so I intend to summarize it. Command Description Command > File Redirects the output to file. Command Redirects the input

3.1 Regular Expression BasicsThe primary function of regular expressions is text query and string manipulation. is actually string filtering.Regular expressions include ordinary characters and metacharacters character, meta-character main, see the

#!/bin/Bashn_url="http://nginx.org/download/nginx-1.8.0.tar.gz"N_pack=`Echo$N _url|awk-F'/' '{print $}'' N_upack=`Echo$N _url|awk-F'/' '{print $}'|awk-F'.' '{print $ "." $ "." $-$}'' N_dir="/usr/local/nginx"functionNginx () {if[ `WhoAmI` !="Root"];

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

#!/bin/Bashprocess_name="Org.apache.catalina.startup.Bootstrap"Shutdown_call=0functionShutdowntomcat () {process_pid=`PS-ef |grep "$process _name"|grep-V"grep"|awk '{print $}'` forIinch$process _pid Do Echo "Info:kill the Tomcat process [$

1. Field (column) Extraction command: Cut [option] file nameOptions:-F column number (extract the first few columns)-D delimiter (split column by specified delimiter)[email protected] sh]# cat student.txt idnamegendermark1alex male 112boby male

#!/bin/bash#比如需要判断一个变量是否含有值:if [[ -z $1 ]] ; thenecho "Something like empty!"exit 0;fi#判断上一条语句是否执行成功if [[ "$?" -eq 0 ]] ; thenecho "$1 更新成功."exit 0;fi#下面再举一个实例NovaPath=”/home/malu/”NovaFile=”/home/malu/access.log”#这里的-x parameter determines whether $

ObjectiveIn the Windows environment, organize the code, the code contains the. svn folder, which exists in all controlled directories and needs to be removed uniformly.But not familiar with Windows shell, want to use Linux rm to delete, how to