Shell

The code is as follows Copy Code #!/bin/sh#------------------------------------------------------------------------------# for debugging use Iptables-v.Iptables= "/sbin/iptables"Ip6tables= "/sbin/ip6tables"Modprobe=

Before we know about redirects, let's take a look at the Linux file descriptor. Linux file Descriptor: Can be understood as a Linux trace open file, and the allocation of a number, this number is similar to the C language operation of the file when

Learn Shell to now, always thought that they will not commit a very two problems, the result of this book last time made a very 2, integrity not protect AH!!! I'm under the test file path except wildcard * and? What can be used outside the same

First of all, in the bash script, there are three kinds of quotes 1. Single quotes '2. Double quotes "3. Inverted quotes ' Single quotation markThe two string enclosed in single quotes is an ordinary string that retains its original literal

Introduction of API Store API store is an API aggregation platform that can provide a variety of data services to the outside, more representative of the Dev store, Baidu API store and aggregated data, and so on, such services through the provision

1. Single quotation mark (')grep403-212-4921212-234-2343If we're looking for Susan Goldberg and can't use the grep Susan Goldberg Phonebook command directly, GREP will treat Goldberg and phonebook as files that need to be searchedgrep ' Susan Gold '

This article goes from http://www.kissyu.org/backgroundWe can often find such statements in a shell script >/dev/null 2>&1 . Before I did not go into the role of this command, copy replicable, until last week I wrote this order accidentally 2>&1

The effect is to convert the argument list to small pieces to pass to other commands to avoid the problem of too long argument listXargs is a filter that passes parameters to the command, and is also a tool for combining multiple commands. It

ITerm2 is an OS X next open source free terminal tool, as a substitute for terminal, compared to it has its own features, such as screen cutting, System hotkey, check copy and so on (below is a brief introduction). The use of zsh, paired with ITerm2,

This article is part of the Linux Shell Series Tutorial (eight), more shell tutorials: Linux Shell Tutorials In previous: Linux Shell series Tutorial (vii) Shell output This article has a brief introduction to the Shell printf command, which

The shell can often be seen: >/dev/null 2>&1Eg:sudo kill-9 ' ps-elf |grep-v grep|grep $1|awk ' {print $4} ' 1>/dev/null 2>/dev/nullThe result of the command can be defined in the form of a%> output/dev/null represents an empty device fileWhere does

the shell can often be seen: >/dev/null 2>&1 Eg:sudo kill-9 ' ps-elf |grep-v grep|grep $1|awk ' {print $4} ' 1>/dev/null 2>/dev/nullThe result of the command can be defined in the form of a%> output/dev/null represents an empty device fileWhere

Summary from:HTTPS://GITHUB.COM/QINJX/30MIN_GUIDES/BLOB/MASTER/SHELL.MD;http://blog.itpub.net/14293828/viewspace-14475701. What is a shell script exampleLet's look at an example:#!/bin/sh~mkdir shell_tutcd shell_tut for ((i=0; i10 do touch

It's all the same, it's quitting, just returning this 0 and 1 is the error or the correct code to return to the operating system.Exit 1 refers to the return value that the script runs to indicate success or failure, and the reason for the

Configuration of the Stelnet server# Generate RSA key pair[DEVICEB] Public-key Local create RSA# Generate DSA Key pair[DEVICEB] Public-key Local Create DSA#使能SSH服务器功能[DEVICEB] SSH server enable#配置接口ip地址#设置stelnet客户端登陆用户界面的认证方式为scheme[Deviceb]line

For example, comparing strings, judging whether the file exists and whether it is readable, etc., usually uses "[]" to represent the condition test.Note: The space here is important. The space to ensure the square brackets. I have wasted a lot of

After a few days of disk-filled events, I found myself completely unaware of DU's command, so I was determined to learn.I'll just be a porter, the extranet. Find a tutorial' Du ' is the size of the Find folderDuTyping The above at the prompt gives

1.VNC remote connection to Linux graphical desktop2.SSH Secure Shell Client connection to Linux terminal3. Set FTP and Linux transfer files1.VNC remote connection to Linux graphical desktopRun under CentOS:Yum-y instll VNC Vnc-serverAfter running,

  Note: When performing some performance tests, we sometimes want to calculateProgramSometimes, you may write a shell script to control the performance test (for example, you want to run n times to obtain the average value). In short, one of these

1. PS1: (set the prompt character) This is interesting. You can customize your own prompt; Every time we press the [enter] key to execute a command, the prompt character will appear again, and we will take the initiative to read the variable