shell scripting books

and so on one by one corresponds; case $MENU In Jiaozi) The echo "Your Choose is $REPLY" # # variable REPLY dedicated to storing the results of user input echo "$MEN U Price is 20 ";; Lamian) echo "Your Choose is $REPLY" Echoes "$MENU Price is 15";; Mifan) echo "Your Choose is $REPLY" Echoes "$MENU Price is 18";; Daoxiaomian) echo "Your Choose is $REPLY" Echoes "$MENU Price is 12";; Quit) echo "Your Choose is $REPLY" break;; *) echo "Your Choose is $REPLY" echo "Choose a

In order to check the network connection status between the daq01 and the blade server,1. Use the output rule of ping command, if can ping pass, will output 0% packet loss value; If you cannot ping the pass, the 0% packet loss is not output2. If the ping command output 0% packet loss successful execution, the network connection is OK, otherwise the network connection is not3. in Shell scripts | | For use, refer to 20360107Command1 Command2Indicates:

content such as/boot is a specific content)$?: The state returned after the previous command was executed, when the return status value is 0 indicates normal execution, and a value other than 0 indicates an exception or errorDetermine if an error occurs correctly for 0 exception error for non 0 value between 1-127$: The currently executing process/program name (which is the name of the currently executing command or program)Tip: Add Environment variablesVim/etc/profileAt the end of the document

Shell Scripting Study Guide Mechanical industry publishing ISBN 987-7-111-25504-82nd Chapter2.4Primary traps1. Today's systems, for #! The length limit for this line is from 63 to 1024 characters, try not to exceed 64 characters.2. On some systems, the command-line section contains the full path name of the command. Some systems do not, however, and the command line part is passed to the referenced program

Tag: The grep command of the Shell scripting toolgrep (abbreviated from globally search a Regular expression and Print) is a powerful text-search tool for Linux systems that can search for text using regular expressions , and print out the matching lines. Egrep and Fgrep are grep extensions that support more re- metacharacters ,fgrep is fixed grep or fast Grep.linux uses the GNU version of Grep, which is mo

How to build a archive file using shell scripting and export the signed IPA file.1. Build Script DescriptionThis shell script is used for Build,xcode workspace source code engineering and is exported as a re-signed IPA file for distributing test installation files and files for submitting AppStore audits. Implement auxiliary product development, test configuratio

tasks, you need to include the if/then criteria to judge. Shell scripting supports such operations, including comparison operations, determining whether a file exists, and so on.The basic if Condition command options are:-eq-compare two parameters for equality (for example, if [2–eq 5])-ne-comparison of two parameters is not equal-lt-parameter 1 is less than parameter 2-le-parameter 1 is less than or equal

-nand 11 use, tell read command to accept single word specifier exitCode 2-25[Email protected]:/data# cat Demo5 #!/bin/bashread-n1-p "Do you want to continue [y/n]" Answercase $answer in y|y) E Cho echo "fine,continue on ...";; N|n) echo echo "Ok,goodbye" exit;; Esacecho "This is the end of the script" [email protected]:/data#./demo5 does you want to continue [y/n]yfine,continue on]. . This is the end of the script　　Hidden mode read, the-S optio

equal to [-X $file] Determines whether the $file exists and has executable permissions, and the same-R test file readability [-N "$a"] determine if the variable $ A has a value, test the empty string with-Z ["$a" = "$b"] determine whether the value of $ A and $b are equal [Cond1-a Cond2] to determine whether Cond1 and Cond2 are also established,-o means cond1 and Cond2 have a set up Be aware of the spaces in the Condition Test section. there are spaces on both sides of the square brackets, and

Recent project requirements, need to write some shell script interaction, the pipeline is not enough time, expect can be very good to implement the interaction between the script, search for information, found that many articles on the Web are reproduced, I think this article is also good, so simple changes to take over and share with you ~1. Expect isSpawn: Add the shell commands you need to execute, such

to the right of the symbol.3. Expand your knowledge The Shell can represent the result of a command, usually assigning a value to a variable, such as the following command: # n= ' Wc-l/etc/passwd | awk ' {print '} ' # echo $n Date also has many uses, for example: date +%h # hours 21date +%m # minutes 48date +%s # seconds 48date +%t # time 21:49:04date%w # Week 0 # from 0 Start, representing Sunday date-d "-1 day" +%f # me

????????echo?"$username?已经登录"????????echo?"fuck?,go?out?my?system"?|?write?$username????else????????echo?"$username?已经下线"????fi????sleep?3done}21, randomly generated within 10 of the number, to achieve the word guessing game, the hint is relatively large or small, equal to exit#!bin/bashlim=10let?key=$RANDOM%limread?-p??"please?input?a?number?less?than?$lim:?"?numuntil?false;do????if?[?$num?-le?$lim?>?/dev/null??]??[?$num?-ge?0??>?/dev/null?]?;then????????if?[?$num?-lt?$key?];then????????????rea

Overview:Overview:This section describes the array of shell scripting in Linux, advanced string processing, advanced variables, and configuring the user's environment.One, function and positional parameter extension1. TheShift command implements the jump in the position parameter, which squeezes the leftmost parameter650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M01/86/5B/wKiom1e9EFvAun-AAABG0xL4ac

;NBSP; value2= "fossmint.com" NBSP; if[ "$value 1" = "$value 2" NBSP;] 7, use $ (command) to do substitution command substitution is replacing the command itself with the output of this command. Use $ (command) instead of quotation marks ' command ' to do the command substitution. This is also recommended by the Shellcheck tool, which displays warnings and recommendations for Shell scripti