Shell

Turn http://blog.csdn.net/hittata/article/details/7042779 #/bin/bash printf "*************************************\n" echo "cat file Whiel Read line" Cat Test.txt |while Read line Do Echo $line; Done printf "*****************

Requirement-driven Linux Shell Programming Requirement-driven Linux Shell programmingtable of Contents 1. Where can I find the basic Material about Linux Shell programming? 2. How to time a function/program (Get the execution time of a

Ifconfig |grep "inet addr" |cut-f 2-d ":" |cut-f 1-d "" |head-n 1IfconfigEth0 Link encap:ethernet HWaddr xx:xx:xx:xx:xx:xxinet addr:192.168.1.100 bcast:192.168.1.255 mask:255.255.255.0Inet6 ADDR:FE80::226:9EFF:FE60:4640/64 Scope:linkUp broadcast

Script monitoring:The process that gets the maximum number of handles:Link Analysis:Script fragment:Case"$handle" inch2) echo"The handle of the process:"Echo" "Handle| Awk'{print $ "\ n" \ n "\ $7" \ n " $9" \ n "$11" \ n "}'>Temp forIinch' Cat temp

Software shelling can compress the volume to prevent resource modification and increase the difficulty of cracking. We need to debug a software. Generally, the non-compressed Shell needs to be removed first. Program Debugging is supported. Common

There are three common file descriptors in shell programming:0: stdin, standard input. The default value is the keyboard input.1: stdout, standard output. The default value is screen output.2: stderr, standard error output. The default value is

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Format For name in list Do Loop body Done Example: List the usernames, uid, and shell in the/etc/passwd file, Row 1, 3, 6, and

The structure features of all return texts are as follows: If the number of characters is an even number, it is structured as: A Character Sequence is connected to another character sequence with the same but the opposite order. If the number of

20. Use the shell command in the pipeline to obtain system running data: 1. output the five commands that occupy the most memory in the current system:#1) run the ps command to list all processes running on the current host.#2) The fifth field is

Shell Structures are divided into three categories: sequential structure, branch structure, and cyclic structure. 1. If statement Syntax format: IfThenFi If the return value of the last command in statement sequence a is 0, execute the command

[This is Android embedded learning series I] Although I have been using Linux for more than a year, I do not know many principles. Now, let's take notes on learning Android embedded courses with sundy. Shell is actually an interface for user

Shell text filtering (awk) classification: Linux Shell script learning 1241 people read comments (0) Add to favorites report shell Regular Expression script task Language If you want to format packets or extract data packets from a large text file,

When running commands in Linux Shell, each process is associated with three open files and uses file descriptors to reference these files. Because the file descriptor is not easy to remember, shell also provides the corresponding file name. Standard

Requirement: create 10 SYSTEM account oldboy01-oldboy10 in batches and set to generate password (different password ). Implementation script: #!/bin/bash#Question3for i in $(seq -w 10)do        useradd -s /bin/bash oldboy$i        echo "password$i" 

Note: The subscript of the array in shell starts from 0 by default. 1. Place the string in an array to obtain its length. Copy codeThe Code is as follows :#! /Bin/bash Str = "a B -- n d" Array = ($ str) Length =$ {# array [@]} Echo $ length For (I

Code 1Ubuntu and centos Copy codeThe Code is 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 :" Read line Echo $

Copy codeThe Code is as follows :#! /Bin/bash #2013-01-06 14:00:00 wanggy exp # Note: ping monitor Set-u # Set-x Ping_fun () { D_network = 192.168.1 Echo-n "input the network (default $ d_network ):" Read network :$ {Network: = $ d_network} Echo

The following are Shell Study Notes for 1-2 days: --------- I am a separator --------- Hardware is executed, and operations are performed between the kernel and hardware. Command parser. Shell script Components System commands Text processing

Both $ * and $ @ provide quick access to all parameters, both of which can store all command line parameters in a single variable. $ * The variable saves all the parameters provided on the command line as a single word and is treated as a single