Shell

Here I share is learning the computer Shell scripting language method, you may not be in the software industry, but I suggest also look, because I did not say what technical details, the main share is to refine the generality of the method, which is

Today to see the Unix shell example fine solution on the Youdao awk on the topic after doing it to share with you Pre-processing documents: Mike Harrington: (510) 548-1278:250:100:175Christian Dobbins: (408) 538-2358:155:90:201Susan Dalsass: (206)

Objectiveor do you write an automated packaging script today that takes you to get the last file name from the path name. Here is a record of the implementation process. Of course, in the end I will also give the official practice. (PS: Very awkward,

First script file Copy Code code as follows: #!/bin/bash echo "This are my I-A-bash code!" Exit 0 redirect Symbols and mathematical calculations Copy Code code as follows: #!/bin/bash Echo-n "The time and

#查找当前目录中是否存在指定目录, if it does not exist, it is created Copy Code code as follows: function mkdir_1 { if test! -D $ Then mkdir $ Fi } #指定文件中的 "prefix =. *" string replaced with "prefix=/home/gnome-unicore-install2/usr/

To compare two strings for equality: If ["$test" x = "Test" x]; Then Here are a few key points: 1 using a single equal sign 2 Notice that there is a space on each side of the equal sign: This is what the Unix shell requires 3 Notice the last X of "$

Copy Code code as follows: #!/bin/bash #main--- network=192.168.1 Ping_count=3 Ip=1 : >ip_use : >ip_idle : >ping_action echo "' Date" +%y%m%d%h:%m:%s "'-----> Script starts executing ..." While [$IP-LT 255] Todo host= $network. $IP

First of all, let's look at the problem description, the following figure is my run-time error screenshot: Solving method Analyze the reason, maybe because I have a problem with my platform migration, we have permission to convert. 1 conversion

Function:1. Only in the backup machine, the remote server only need to allow the backup machine with root through the key login;2. Configure which servers to back up on the backup machine, add or subtract the array in need_backup_servers;3.

1, extract the system load information Copy Code code as follows: #!/bin/sh host=$ (hostname) channel=$ (hostname | sed ' s/[0-9]//g ') runday=$ (Date +%y-%m-%d) iphost=$ (/sbin/ifconfig | grep ' inet addr: ' | grep-v ' 127.0.0.1 ' |

This email alert script is everywhere, a lot of use of sendmail, Postfix, feel a bit overqualified, and some use Perl net::smtp and AUTHEN::SASL module, but I use Perl is not good, The old send out some baffling mails (for example if (a>1) {print (a)

Arithmetic operations are essential in any programming language, and the shell is no exception. First, use Let, (()) and [] for arithmetic operations You can use the normal variable assignment method to define a numeric value, which is that it

Randomly generated 10 8-bit password shell scripts1. First Capital Letter2. Middle six-digit alphanumeric random mixing3. Eighth place [0-9] #!/bin.bash for i in {1..10} do a= ' head-c 500/dev/urandom | tr-dc a-za-z | tr [A-z] [a-z]|head-c 1

The script that prints the Java thread occupancy stack is invoked if the CPU occupancy rate continues to reach more than 80, see https://github.com/oldratlee/useful-shells/blob/master/ Show-busy-java-threads.sh, see his GitHub wiki! in concrete

One, logical operators Logical Volume Label Express meaning 1. About the files and directories of the detection of logical labels! -F Common! Detect the existence of "archives" eg:if [-f filename]

1, the shell variable statement judgment An expression meaning ${var} Variable var with the same value as $var ${var-default} If Var is not declared, then use $default as

Sometimes we need to delete the empty folder recursively, search the internet for a while, did not find a better shell script, so we wrote a Script Copy Code code as follows: #!/bin/bash # Author: Ten years later, Lou's brother #

Nodejs is really very hot, before the past, but never seriously recorded anything. Build its development environment under Ubuntu Try a quick, easy way to get the system to automatically help you install what you need, and we'll generate a shell

The reason for bad interpreter:no such file or directory is the file format problem. This file is written under Windows. Line-wrapping is not the same as UNIX, but under vim if it is not set it is completely invisible.Problem Analysis:1, will be

I am not studying things under Linux, so here is only a description of the use of shell script, I am in the process of using the problem recorded, but also write down some of the rules of the shell script syntax, easy to view later. Let's take a