ps3 case shell

First set a small goal, first proficient in the shell say! --OLD boyUseShelldeveloping a Springboard function script caseexample 17_6: Developing an Enterprise-class Shell springboard machine case. Requiring a user to log on to a springboard machine can only perform an administrator-given option action, and does not allow any form of interrupt script to execute a

Tags: case judge logical judgment file directory attribute in shell script determine if special usageI. Logical judgments in the shell Format 1:if condition; Then statement; Fia=2if [ $a -ge 2 ];then echo ">=2";fi Format 2:if condition; Then statement; else statement; Fia=1if [ $a -ge 2 ];then echo ">=2";else echo " Format 3:if ...; Then ...; Eli

/temp.pidKillid = ' Cat/tmp/temp.pid 'For-PID in $killidDo/bin/kill-9 $PID 2>/dev/nullDone8. Batch Add UsersCat useradd.sh#!/bin/sh#Authur: Sam # The script to add user#/etc/passwd Infoecho "Pleass input Username:"Read nameecho "Pleass input number:"Read numN=1While [$n-le $num]Do/usr/sbin/useradd $name $nn= ' Expr $n +1 'Done#/etc/shadow Infoecho "Pleass input the password:"Read passwdM=1While [$m-le $num]Doecho $passwd | /USR/BIN/PASSWD--stdin $name $m >/dev/nullm= ' expr $m + 1 'Done9. Delete

Tags: control statement CTO ROC read case share picture COM ASE pngThe Linux shell has learned several times.But the memory is not good, always forget, chase the main reason may be not common reason!Case beginning Esac EndHere's the result.Input method does not enter the symbol is wrong, the beginning of the total error, and then switched the input method is good

I. Overview of CASE statementsUse case statements to rewrite if multiple branches to make the script structure clearer and more hierarchicalPerform different command sequences for different values of variablesThe case statement is structured as follows:Case Variable value inMode 1)Command sequence 1;;Mode 2)Command Sequence 2;;*)Default command sequenceEsac1 #!/b

number of arbitrary characters meaning! 9Echo"Usage $ {Hello}"Ten ;; OneEsacTo create a shell script with the VI editor:To write a shell script with the VI editor:The results of the implementation are as follows:In the above sh09-2.sh case, if you enter "sh test02.sh test" to execute, then "usage test02.sh {Hello}" will appear on the screen, telling the

if logic judgment in shell scripts Logical judgment Expression: -GT (>); Greater than great than -lt ( If logical judgment format: Format 1:if condition; Then statement; Fi format 2:if condition; then statement; Else statement; Fi format 3:if ...; Elif ...; Then ...; else ...; Fi -- can use | | Combine multiple conditions a conditions b:a and b conditions a| | Condition b:a or b if [$a-gt 5] [$a-lt]; then if [$b-gt 5] | | [$b-lt 3]; Then F

Tags: for statement while statement case statement Shell Yang ShufanThe shell, as a scripting language, also contains other program control structures such as loops, branches, and so on, making it easier to perform more complex and powerful functions.Using the FOR Loop statementAt work, you often encounter a task that needs to be executed multiple times, and each

Case statement in shell: It can match the variable content with multiple templates, and then decide which part of the Code should be executed based on the template that matches successfully. Format of www.2cto.com: case matching mother board in TEMPLATE 1 [| template 2]…) Statement group; TEMPLATE 3 [| TEMPLATE 4]…) Statement group; the matching sequence of esacc

Shell Process Control (if, else, case, while, for, until), shellcase 1. Select Conditions 1.1.if statement Simple syntax #!/bin/bashMATH_SCORES="$1"NAME="$2"if [ -z "${MATH_SCORES}" ]then printf "The command requires that options have a scores.\n" printf "What's ths scores of your math? :" read MATH_SCORESfiif [ -z "${NAME}" ]then printf "The command requires that options have a student's name.\n" prin

shell programming often encounters strings, file content-case conversions, and choosing the right commands in different scenarios can improve programming efficiency. Applicable Scenariosfile contents or strings that need to be converted to uppercase and lowercasestring Case Substitutionlowercase Replace UppercaseEcho " Hello World " TR ' [A-z] ' ' [A-z] ' Echo "

Case: Flow control statements• Loop Statement For...done statement• Use (()) to extend the method of using arithmetic operations in the shell• Looping statement nesting• Jump out of the loop: Break and Continueshift parameter Left SHIFT commandHow to use functions in shellCase statement; Select structureCase SWITCH inVALUE1)Statement.....;;Value2)Statement.....;;*)Statement.....;;Esac#！ /bin/bashecho "*****

to break in other languages, it means jumping to the end of the entire case statement.The value will detect each pattern that matches. Once the pattern matches, the other mode is no longer resumed after the corresponding command is executed. If there is no matching pattern, use an asterisk * to capture the value and then execute the subsequent command.The following script prompts you to enter 1 to 4 to match each pattern: Echo ' Input a number be

The syntax format of case is as follows:Case VaR inExp-1) command body 1 ;;Exp-2) command body 2 ;;...*) Command body ;;Shell calculates the value of the variable VAR, and compares the result with the formula exp-1 and exp-2 until a matching formula is found. If a match is found, run the following command until a semicolon (;) is encountered. Generally, the case