Shell

Below we will introduce you to 5 to protect your iphone's shell, they can be broken, broken and waterproof and so on. 1.OtterBox symmetry Series Reason for recommendation: Don't take up the land in your pocket. This is a

The Shell function returns the value, generally has 3 kinds of ways: Return,argv,echo 1) Return statementThe return value of the Shell function, as in other languages, can be returned through the return statement.Example:

The process used by git in a team project 1. First from a git remote repository to the clone project to the local git clone warehouse Address 2. Create a development Branch Normally we write code that does not write on the master

Description TAC and Rev are not necessarily connected, the only same is that they are "villains". TAC is actually cat's reverse write, cat normal output, the TAC is inverted output, but the last line from the line output, that Rev? Rev is the last

1. Examples of error methods A Var=1+1 Echo $var The result of the output is 1+1, tragedy, hehe b Var=1 var= $var +1 Echo $var The output result is 1+1, still tragic, hehe 2. The correct method 1) using Let Var=1 Let "Var+=1" Echo $var The output

The "Swiss Army Knife" here refers to the work of a simple command that can complete a large chunk of code in other high-level languages. The following content is a summary of the Joshua Levy on Quora's website: Get the intersection, collection,

Designing concurrent Queues Copy Code code as follows: #include #include using namespace Std; Template Class Queue{PublicQueue (){Pthread_mutex_init (&_lock, NULL);}~queue (){Pthread_mutex_destroy (&_lock);}void push (const t&

In general, we only need to monitor the program process in the not on it. But this time, the company developed the program, the process is still in, but the deadlock. Lead to a wide range of effects, but even more importantly, do not know where the

Original works, allow reprint, please be sure to use hyperlinks in the form of the original source of the article, author information and this statement. Otherwise, the legal liability will be investigated. http://nbmonster.blog.51cto.com/1977736/665

awk commandawk, like SED, is a streaming editor that operates on lines in the document, one line at a line. Awk is more powerful than SED, and it can do what sed can do. The awk tool is actually very complex and has special books to describe its use.

http://blog.csdn.net/pipisorry/article/details/44681081Little TricksDirect view of Linux shell commands and explanations in the command lineMans commandHelp commands for better use under Linux-cheat#pip Install cheat$cheat Tar[better use of Linux

1. The prototype of the variables in the shell: ${var} Execution of a sequence of commands#等价于 $ var=echoEcho2. Command replacement $ (cmd) execution of a string of commandscommand to replace $ (cmd) and sign ' cmd ' (note that this is not a single

Shell if-B Returns True when file exists and is a block file-C Returns True when file exists and is a character-D returns True when pathname exists and is a directory-E Returns True when a file or directory specified by pathname is present-F Returns

Two months ago used HBase, now the most basic commands are forgotten, leave a reference ~ Go into hbase shell console$HBASE _home/bin/hbase ShellIf you have Kerberos authentication, you need to use the appropriate keytab for

Bash saves a list of previously executed commands by defaultThe current shell's process is saved in the bufferThe commands in the buffer are saved in the file after the shell exits. Bash historyUse the up and down arrows to look over the previously

Linux ops shell script gadget, if you want to share this article, please indicate the source of the article, the following script is for reference only, if the error placed on the server, the consequences please be conceited1. Detecting CPU percent

[] and test Both are the same, and the test expr and [expr] have the same effect on the command line.The three basic functions of test are to judge a file, judge a string, and judge an integer. Supports the use of "and or not" to concatenate

Function: TitleCode:#!/bin/shrecursive ( ) {     for file in $1      do       subfile= ' ls $2$3/$file '         for subsubfile in  $subfile        do #                echo  $subsubfile          if [  "$subsubfile"  ==  "$2$3/$file"  ]         then  

There are two types of Linux users in the world: adventurous and cautious.One type of user is always instinctively trying any new choice that can poke its pain points. They have tried countless window managers, system distributions, and almost all

Awk was finally able to get started, so he tidied up the article, mostly from the Internet.First, bash supports one-dimensional arrays (which do not support multidimensional arrays) and does not limit the size of arrays. In the shell, the array is