ps3 case shell

Tags: hint info print view System Bash MEM Err BSH statThe case selection statement in the shell script can be combined with the read instruction to achieve a good interactive response operation, case receives one or more parameters passed in by the read instruction, and then the case is selected according to the param

Script Realization Man-machine One: The first method, let the machine give a random number 0-2, we can assume that there is an array for the game (stone scissors cloth), game[0]= stone game[1]= scissors game[2]= cloth, we will Num's variable to be game[num], array inside bit. In combination with the case statement, we give the user the impression that when the input 1 is a stone, then the game "0" for the stone, directly inside the

output variable A. echo "Mem_total: ${mem_total}m" echo "mem_used: ${mem_used}m" echo "Men_free: ${mem_free}m" echo "sum_used: $sum _used%" # Similarly, the Bash shell does not support the comparison of the decimal point, where I use the BC to compare the values, if the result is true, the return value is 1,false return value is 0. # like echo "1.1>1.2" |BC then output is 0, if echo "1.1>1" |BC then the output is 1.warning= ' echo ' $sum _used>90 ' |

If syntax:if [expression]ThenCommandselif [Expression2]ThenCommandsElseCommandsFiCase Syntax: Case string1 inSTR1)commands;;STR2)commands;;*)Commans;;EsacLoop statement for syntax:for Var in listDoCommands doneIn this form, for each item in the list, the For statement is executed once, the list can make a variable containing a few words, separated by spaces, and several values that can be entered directly, each time the loop is executed, Var is given

script prompts you to enter 1 to 4 to match each pattern: Echo ' Input a number between 1 to 4 ' echo ' Your number is:\c' Read Anum Case $aNum in 1) echo ' you select 1 ' ;; 2) echo ' you select 2 ' ;; 3) echo ' you select 3 ' ;; 4) echo ' you select 4 ' ;; *) echo ' Do not select a number between 1 to 4 ' ;; Esac Enter different content, there will be different results, for example:Input a number betwee

You must enclose all the file names you get into the array, or the for loop will be parsed as a wildcard, or you can use a shell dictionary, as well as quotation marks.Shell Dictionary Example#!/bin/BashEcho "Shell Definition Dictionary"#必须先声明declare-A dicdic= ([key1]="value1"[key2]="value2"[key3]="Value3") #打印指定key的valueEcho${dic["Key1"]} #打印所有key值Echo${!dic[*]} #打印所有valueEcho${dic[*]} #遍历key值 forKeyinch$(

configuration (); try {int res = Toolrunner.run (conf, new Logclean (), args); System.exit (RES); } catch (Exception e) {e.printstacktrace (); }} public int run (string[] args) throws Exception {configuration conf = new Configuration (); Job Job = job.getinstance (conf, "Logclean"); Set to be packaged to run Job.setjarbyclass (Logclean.class); Fileinputformat.setinputpaths (Job, args[0]); Job.setmapperclass (Mymapper.class); Job.setmapo

-keygen: Raw-cost machine SSH public key Ssh-copy-id: Copy the public key of the springboard machine to the remote server Upload-local-key: The local public key is uploaded to the springboard machine, which realizes the free connection of the springboard machine. passwd: Change Password Exit: The first layer closes the current session and the second level returns to the previous pageNote: In addition to "Upload-local-key" as a custom command, the other reference commands themselv

). The end of the course is to write the English case in reverse. It becomes ESAC. It won't be very hard to recite!Other than that. Each variable has a two semicolon (;) to represent the end of the program paragraph, which is very important! Why should there be * this variable content at the end? This is due to the assumption that the consumer is not the input variable content one or two o'clock. We can tell the user about the information.Generally sp

, the cycle will stop.While [conditional-judging] do program done#!/bin/bash# example Usage while [$#-GT 0]; Do case "$#" in 3) echo "The first parameter is $, the number of arguments is $#" ;; 4) echo "The first parameter is $, the number of parameters is $#" ;; *) echo ' what happened ' ;; Esac # Corresponds to a case statement, shap

Case Flow control:Case structures are used for condition judgments in a variety of situations. Similar to switch/case statements in other programming languages, but it is very different from the grammatical form.Case string inModeStatement;;Mode 2 | Mode 3)Statement;;*)statements executed by default ;;EsacTip: Esac is the case in turn.Break and Continue Break com

! Just become ESAC! It won't be hard to recite! In addition, each variable content of the program section will need two semicolon (;;) to represent the end of the program paragraph, which is very important! Why does it need to have * this variable content at the end? This is because if the user is not the input variable content one or two o'clock, we can inform the user of the relevant information Ah!In general, in the syntax of "case $ variable in",

naturally written in the English language in turn! Just become ESAC! It won't be very hard to recite! In addition, two semicolons are required at the end of each program section of the variable content (;;) to represent the end of the program paragraph, which is very important! Why should there be * this variable content at the end? This is due to. Assume that the user is not the input variable content one or two o'clock, we can inform the user of the relevant information Ah!In general, use the

Create a shell with a case statement (function is open, close, reset, display virtual machine)#!/bin/bashCase "$" inStart)/* When the keyword is start, execute the statement that opens the virtual machineecho Start ...Virsh Start $ >/dev/null;;Poweroff)/* Executes a statement that forces the virtual machine to be closed when the keyword is PoweroffEcho Poweroff ...Virsh Destroy >/dev/null;;View)/* Executes

} function Getdifftimebetweeninseconds () { Local _start=$ (date +%s-d ' 2010-09-01 17:00:00 ') Local _end=$ (date +%s-d ' 2011-09-01 18:40:40 ') tep=$ (($_end-$_start)) tep2=$ ((3600*24)) result=$ (($tep/$tep 2)) extra=$[$tep% $tep 2] DECLARE _hours=0 DECLARE _seconds=0 if [$extra-ge 3600]; Then _hours=$ (($extra/3600)) _seconds=$ (($extra%3600)) El

1. Structure　　2. Case studies#!/bin/bashecho "Wayne:input 1" echo "echo : Input 2" echo "We : Input 3" read-t 30-p "Input your choice:" Choca Se "$cho" in "1") echo "Wayne Love echo" ;; " 2 ") echo" Echo love Wayne " ;; " 3 ") echo" We love EW " ;; *) echo "No no No" ;; esac~

leti+=1done echo echo "theNumbermaxis: $max; Minnumberis: $min " 16. Write scripts, edit menus, the user enters a number in the menu list to display the corresponding price. #!/bin/bash#------------------------------------------# Filename:caidan.sh # date:2017-09-10# author:liuke# Description: Edit menu, user input A number in the menu list, display the corresponding price. #-------------------------------------------echo "1=yangroutang2=mifan3=hulatang 4=jiaozi5=lamian6=huimian" read- P "Pleas

logical operators logical operators used in [] and test logical operators used in [[]] Description -A And and, both ends are true, then true -O || Or OR, at both ends there is a true and true ! ! Not non, the opposite is true Tips:！ Inverse: A logical value that is opposite to a logical value-A Chinese meaning and (and ): Two logical values are true, the return value is true, and the

Integer two-dollar comparison operator The comparer used in [] and test The comparer used in (()) and [[]] Description -eq = = or = Equal abbreviations, equal -ne != Not equal abbreviations, unequal -gt > Greater than greater than -ge >= Greater than or equal to greater equal -lt Less than than similar -le Less than or equal to

Tags: shell linux delete user Batch AutomationCase-then the previous caseWant to bulk delete all users created in the previous caseScript Show: (Next time explain)#!/bin/bashecho > userlist.txt;for i in `seq 50`do id student$i >/dev/null 2>/dev/null; [ $? -ne 0 ] echo -e "[\033[31merror\033[0m] user student$i not exist." continue; userdel -r student$i >/dev/null 2>/dev/null; [ $? -eq 0 ] echo -e "[\033[32mok\033[0m] delete user student$i succes