Shellscript script Learning

Shellscript script Learning

[Root @ fwq prac] # cat sh01.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHecho-e "Hello World! \ A \ n "exit 0 ==================================== ================================ [root @ fwq prac] # cat sh02.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHread-p "Please input your firstname:" firstnameread-p "Please input your lastname: "lastnameecho-e" \ n Your Full name is $ firstname $ lastname "================== ================================ [root @ fwq prac] # cat sh03.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :~ /Binexport PATHecho-e "I will use touch command to create 3 files. "read-p" Please input your filename: "fileuserfilename =$ {fileuser: -"filename"} date1 = $ (date -- date = '2 days ago '+ % Y % m % d) date2 = $ (date -- date = '1 days ago '+ % Y % m % d) date3 = $ (date + % Y % m % d) file1 =$ {filename }$ {date1} file2 =2 {filename }$ {date2} file3 =3 {filename }$ {date3} touch "$ file1" touch "$ file2" touch "$ file3" ====================================== ================================ [Root @ fwq prac] # cat sh04.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :~ /Binexport PATHecho-e "Your shoshould input 2 number, I will cross them! \ N "read-p" first number: "firstnuread-p" second number: "secnutotal = $ ($ firstnu * $ secnu )) echo-e "\ n The result of $ firstnu X $ secnu is ==>$ total" ================ ============================================ [root @ fwq prac] # cat sh05.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :/~ /Binexport PATHecho-e "Please input a filename, I will check the filename's type and permissions. \ n "read-p" Input a filename: "filenametest-z $ filename & echo" You Must input a filename. "& exit 0 test! -E $ filename & echo "The filename '$ filename 'do not exist" & exit 0 test-f $ filename & filetype = "regular file" tset-d $ filename & filetype = "directory" test-r $ filename & perm = "readable" test-w $ filename & perm = "perm writable" test-x $ filename & perm = "perm executable" echo "The filename: "$ filename is a $ filetypeecho" And the permissions are: "$ perm ========================================== ==== ================ [Root @ fwq prac] # cat sh06.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :/~ /Binexport PATHread-p "Please input (y/n ): "yn [" $ yn "=" y "-o" $ yn "=" Y "] & echo" OK, continue "& exit 0 [" $ yn "=" N "-o" $ yn "=" n "] & echo" Oh, interrupt "& exit 0 echo" I don't know what your choice is. "& exit 0 ======================================== ================================ [root @ fwq prac] # cat sh06-2.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :/~ /Binexport PATHread-p "Please input (y/n ): "ynif [" $ yn "=" y "] | [" $ yn "=" Y "]; thenecho" OK, continue "exit 0 fiif [" $ yn "=" N "] | [" $ yn "=" n "]; thenecho" Oh, interrupt "exit 0 fiecho" I don't know what your choice is. "& exit 0 ======================================== ================================ [root @ fwq prac] # cat sh06-3.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :/~ /Binexport PATHread-p "Please input (y/n ): "ynif [" $ yn "=" y "] | [" $ yn "=" Y "]; thenecho" OK, continue "elif [" $ yn "=" N "] | [" $ yn "=" n "]; thenecho" Oh, interrupt "elseecho" I don't know what your choice is. "& exit 0fi ======================================== ============================== [root @ fwq prac] # cat sh07.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHecho "The Script name is ==>0 0" echo "Total parameter number is ==>$ #" ["$ #"-lt 2] & echo" number of parameter is less than 2. stop here. "\ & exit 0 echo" Your parameter is ==> '$ @' "echo" The 1st para is ==>1 1 "echo" The 2rd para is ==> $2 "========================================== ======================== [root @ fwq prac] # cat sh08.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHecho "Total parameter number is ==>$ #" echo "Your whole parameter is ==> '$ @'" shiftecho "Total parameter number is ==>$ #" echo "Your whole parameter is ==>' $ @ '" shift 3 echo "Total parameter number is ==>$ #" echo "Your whole parameter is ==>' $ @ '"============================================== ====================== [root @ fwq prac] # cat sh09.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :/~ /Binexport patlif ["$1" = "hello"]; thenecho "Hello, how are you? "Elif [" $1 "=" "]; thenecho" You must input parameters, ex> {$0 someword} "elseecho" The Only parameter is 'hello ', ex> {$0 hello} "fi ================================== ================ [root @ fwq prac] # cat sh09-2.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :/~ /Binexport PATHcase $1 in "hello") echo "Hello, how are you? ";" ") Echo" You must input parameters, ex >{$ 0 someword} "; *) echo" Usage $0 {hello }";; esac = ==================== [root @ fwq prac] # cat sh10.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHecho "Now, I will detect your linux server's service" echo-e "the WWW, FTP, SSH, and MAIL will be detect "testing = $ (netstat-tuln | grep": 80 ") if [" $ testing "! = ""]; Thenecho "WWW is running in your system." fitesting = $ (netstat-tuln | grep ": 22") if ["$ testing "! = ""]; Thenecho "SSH is running in your system." fitesting = $ (netstat-tuln | grep ": 21") if ["$ testing "! = ""]; Thenecho "FTP is running in your system." fitesting = $ (netstat-tuln | grep ": 25") if ["$ testing "! = ""]; Thenecho "MAIl is running in your system. "fi ================================================ ====================== [root @ fwq prac] # cat sh11.sh #! /Bin/bash # Program: # Tring to calculate your demo-ization date at how many days # later... # History: PATH =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :~ /Binexport PATH #1. Inform the user of the purpose of this program and how to enter the date format? Echo "This program will try to calculate:" echo "How many days about your demo-ization date... "read-p" Please input your demo-ization date (YYYYMMDD ex> 20050401): "date2 #2. test whether the input content is correct? Use regular notation ~ Date_d = 'echo $ date2 | grep '[0-9] \ {8 \} ''if [" $ date_d "=" "]; thenecho "You input the wrong format of date .... "exit 1fi #3. start date calculation ~ Declare-I date_dem = 'date -- date = "$ date2" + % s' declare-I date_now = 'date + % s' declare-I date_total_s = $ ($ date_dem- $ date_now )) declare-I date_d =$ ($ date_total_s/60/60/24) if ["$ date_total_s"-lt "0"]; thenecho "You had been demo-ization before: "$ (-1 * $ date_d)" ago "elsedeclare-I date_h = $ ($ date_total_s-$ date_d * 60*60*24 )) /60/60) echo "You will be demo-ized after $ date_d days and $ date_h h Ours. "fi ================================================ ====================== [root @ fwq prac] # cat sh12.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHecho "This program will print your selection! "Read-p" Input your choice: "choicecase $ choice in" one ") echo" Your choice is one ";" two ") echo" your choice is two ";; "three") echo "your choice is three"; *) echo "usage $0 {one | two | three }";; esac = ======================= [root @ fwq prac] # cat sh12-2.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHfunction printit () {echo-n "Your choice is"} echo "This program will print your selection! "Case $1 in" one ") printit; echo $1 | tr 'a-z'' a-Z';" two ") printit; echo $1 | tr 'a-z'' a-Z'; "three") printit; echo $1 | tr 'a-z'' A-Z ';; *) echo "usage $0 {one | two | three }";; esac = ======================= [root @ fwq prac] # cat sh12-3.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHfunction printit () {echo "Your choice is $1"} echo "This program will print your selection! "Case $1 in" one ") printit 1;" two ") printit 2;" three ") printit 3 ;;*) echo "usage $0 {one | two | three }";; esac = ==================== [root @ fwq prac] # cat sh13.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHwhile ["$ yn "! = "Yes"-a "$ yn "! = "YES"] doread-p "Please input yes/YES to stop this program:" yndoneecho "OK! You input the correct answer. "============================================== ======================= [root @ fwq prac] # cat sh13-2.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHuntil ["$ yn" = "yes"-o "$ yn" = "YES"] doread-p "Please input yes/YES to stop this program: "yndoneecho" OK! You input the correct answer. "============================================== ==================== [root @ fwq prac] # cat sh14.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHs = 0i = 0 while [$ I! = 100] doi = $ ($ I + 1) s = $ ($ s + $ I )) doneecho "The result of 1 + 2 + 3 ...... + 100 = "$ s ====================================== ================================ [root @ fwq prac] # cat sh15.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHfor animal in dog cat elephantdoecho "there are $ {animal} s... "done ============================================ ====================== [root @ fwq prac] # cat sh16.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHusers = $ (cut-d': '-f1/etc/passwd) for username in $ usersdoid $ usernamefinger $ usernamedone ========================== ================================== [root @ fwq prac] # cat sh17.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ // Binexport PATHnetwork = "10.6.7" for sitenum in $ (seq 1 100) doping-c 1-w 1 $ {network }. $ {sitenum} &>/dev/null & result = 0 | result = 1if ["$ result" = 0]; thenecho "Server $ {network }. $ {sitenum} is up. "elseecho" Server $ {network }. $ {sitenum} is down. "fidone ============================================ ====================== [root @ fwq prac] # cat sh18.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHread-p "Please input a directory:" dirif ["$ dir" = ""-o! -D "$ dir"]; thenecho "The $ dir is NOT exist in your system. "exit 1 using ilelist =$ (ls $ dir) for filename in $ filelistdoperm = "" test-r "$ dir/$ filename" & perm = "$ perm readable" test-w "$ dir/$ filename" & perm = "$ perm writable" test-x "$ dir/$ filename" & perm = "$ perm executable" echo "The file $ dir/$ filename's permission is $ perm "done ============================================ ========================= [root @ fwq prac] # Cat sh19.sh #! /Bin/bashPATH =/bin:/sbin:/usr/bin:/usr/sbin: usr/local/bin:/usr/local/sbin :~ /Binexport PATHread-p "Please input a number, I will count for 1 + 2 +... your input: "nus = 0for (I = 1; I <$ nu; I = I + 1) dos =$ ($ s + $ I )) doneecho "The result of 1 + 2 + 3 +... + $ nu = "$ s ==================================== ======================================