Shell

AM (Activity Manager) is a tool for managing activity, initiating activity, services, sending broadcasts, and closing windows.start activity:adb shell am start [options] : Can be obtained in the app's Androidmanifest.xml[Options]:-n class name,-a

Replace: If the expression contains special characters, the shell will replace it. For example, using a variable in double quotes is a substitution. The escape character is also a replacement#！ /bin/Basha=tenecho"Value of A is ${a} \ n"The #-e

Note that the actual operation should be based on the actual situation of the script to adjust the corresponding1, installation httpdVI apache_install.sh#!/bin/bashRPM-E httpd httpd-manual--nodepsls/root/httpd*If [$?-eq 0];then # #判断是否已经下载了httpdTar

Transfer from http://www.cnblogs.com/aaronwxb/archive/2011/08/19/2145364.htmlWriting a script yesterday took 2/3 of the day, and most of the time spent on the SED command, today do not summarize the time of yesterday, I'm sorry.There are several

Conditional judgment is the basis for a program to gain intelligence, while the Bourne shell script simulates conditional expressions in most programming languages by command.The control structures supported in the shell are:(1) If then else fi(2)

If syntax:if [expression]ThenCommandselif [Expression2]ThenCommandsElseCommandsFiCase Syntax: Case string1 inSTR1)commands;;STR2)commands;;*)Commans;;EsacLoop statement for syntax: for Var in listDoCommands done  In this form, for each item in the

If the expression contains special characters, the Shell will replace it. For example, using a variable in double quotes is a substitution, and an escape character is also a substitution.As an example: #!/bin/bash a = Ten Echo-e

Abstract: 1) The Linux shell uses let, [], (()) Three operators to manipulate shell variables for simple basic operations; 2) The Linux shell uses expr and BC two programs to achieve advanced operations; 1, basic operation of

The anti-quote bit (') is located above the TAB key of the keyboard, to the left of the 1 key. Note the difference between the single quotation mark (') on the left side of the ENTER key.Plays the role of command substitution in Linux. Command

Http://wenku.baidu.com/link?url=9Q9VU54XuvlN77urP1zwOLVMMrS2EFNx4HcvFizdPl-zQy3K_ Ipd3o-mdu4sbihezumnq0blbwhusuaol_y6quvkxtgjiaem9gq9i-jb5_e Shell in the condition to determine if in the-Z to-D meaning 2011-09-05 [-a file] if the file The existence

One, Bash command processing of 12 steps; 1. Divide the command line into tokens delimited by the fixed element character set; SPACE, TAB, NEWLINE, ; , (, ),, |,& Token types include words, keywords, I/o redirects, and semicolons.2. Check the first

Shell generates a specified range of random numbers and random stringsCategory: Shell 2014-04-22 22:17 20902 People read Comments (5) favorite reports ShellrandomurandomuuidlinuxShell generates a specified range of random numbers and random strings1.

If condition judgment1. Basic syntax:if [command]; ThenStatements that meet the criteria for executionFi2. Extended syntax:if [command];thenStatements that meet the criteria for executionelif [Command];thenStatements that meet the criteria for

3.Shell Input and output3.1.echoThe echo command can display a line of text or a variable, or output a string to a fileecho [option] string-E: Parsing escape characters-N: Carriage return is not newline, Linux system default carriage return

Reprint Address: http://www.cnblogs.com/pipelone/archive/2009/04/17/1437879.htmlExecutes. sh script in Linux, exception/bin/sh^m:bad interpreter:no such file or directory.Analysis: This is caused by different system encoding formats: the. sh file

Open After ESXi ssh , the host summary will be prompted with a warning message ;650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/54/41/wKioL1R9ZqqhK5iJAACxLMlbQlw096.jpg "/>The solution is as follows : VSphere Client Log in to

Defining functionsFunction name {Functional body of a function......｝Function name () {Functional body of a function......｝How to call a functionName of functionWhat are the rules for using functions?1) first defined and then called, you can only

Bash Shell Basic features three (array)One, the array definitionAn array is a contiguous number of independent memory spaces, each of which corresponds to a variable. The bash shell supports only one-dimensional arrays, but there is no limit to the

1 PS-EF: displays running processes, PID, and other information Uid pid ppid C stime tty time cmdroot 1 0 0 03:45? 00:00:02 init [5] Root 2 1 0? 00:00:00 [migration/0] root 3 1 0 0:45? 00:00:00 [ksoftirqd/0] root 4 1 0? 00:00:00 [events/0] root 5 1 0

Use Shell in Linux to monitor network traffic, and use linuxshell #input the network name if [ -n "$1" ]; then eth_name=$1else eth_name="eth0"fi send_o=`ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print