Linux Shell Mini Script Classic Collection

1. Find the same number in two files

Diff-y Xx.txt Oo.txt | Egrep-v "<|>" | awk ' {print $} '

2. Print the first few lines to the first line

Cat 1 | awk ' Nr==2,nr==4{print} '

1. Remove the Linux remote user connection session

[Email protected] logs]# W 10:45:28 up Days, 16:23,  4 users,  load average:0.00, 0.00, 0.00USER     TTY      FR OM              [email protected]   IDLE   jcpu   PCPU whatroot     tty1     -                Sun21    4days  0.00s  0.00s-bashroot     pts/0    192.168.1.2    09:11    0.00s  0.07s  0.00s wroot     PTS/2    192.168.1.2    09:45   30:53   0.07s  0.07s-bashroot     pts/3    192.168.1.8    10:20   22:05   0.02s  0.00s vi operation.log[[email protected] logs]# skill-kill-v pts/3pts/3    root     21217 vi              PTS/3    root     24331 bash            

2. Remote execution of commands via SSH

[Email protected] bin]# iip= "192.168.1.10" [[email protected] bin]# ssh $IIP w 10:54:13 up Days, 20:17,  1 user,
   load average:0.00, 0.00, 0.00USER     TTY      from              [email protected]   IDLE   jcpu   PCPU whatroot     Tty1     -                21mar14  4days  0.09s  0.09s-bash

3. Remote batch execution of MySQL scripts via ssh

#iplist1 = (' Cat.. /tools/dblist | Grep-v \# | awk ' {print '} ' | Sed "1,1d") #userlist2 = (' Cat. /tools/dblist | Grep-v \# | awk ' {print $} ' | Sed "1,1d") #passwordlist3 = (' Cat. /tools/dblist | Grep-v \# | awk ' {print $} ' | Sed "1,1d" ') for ((i=0;i<=${#list1 [@]};i++));d o        iip= ' echo ${list1[i]} | awk-f "." ' {print $4} '        ssh ${list1[i]}  mkdir/home/sqlscrip/        ssh ${list1[i]}  mkdir/home/sqlscrip/$IIP        Clear        SCP: /sqlscrip/$IIP/* ${list1[i]}:/home/sqlscrip/$IIP        Clear        #path        list4= (' ls. /sqlscrip/$iip ') for        ((w=0;w<=${#list4 [@]};w++));        Do                if ["117" = = "$iip"] then                        ssh ${list1[i]}  "Mysql-h ${list1[i]}-u ${list2[i]}-p${list3[i]} < /HOME/SQLSCRIP/${IIP}/${LIST4[W]}; "                        Clear                fi        do        ssh ${list1[i]} ' Rm-rf/home/sqlscrip ' Done

4. Download the war package via SVN

#list第五行为list = (' Cat.. /tools/list  | awk ' {print $} ' | sed "1,1d" ') for ((i=0;i<${#list [@]};i++));d O        curl-u wangyong:abcd1234-o ${ List[i]}        war= ' echo ${list[i]} | awk-f "/" ' {print $NF} '        mv $war: /workapp/done

5. Extract the war package to the specified directory

SSH ${ip} Unzip ${tomcat directory}/webapps/${war package name}.war-d  ${tomcat directory}/webapps/${specified directory}

6, multi-linux server establish trust relationship

Ssh-keygen-t RSACD ~/.sshscp-r id_rsa.pub $ip:/root/.ssh/$ipssh $ip ' Touch ~/.ssh/authorized_keys && chmod 644 ~ /.ssh/authorized_keys ' ssh $ip "cat ~/.ssh/$ip >> ~/.ssh/authorized_keys"

7. Delete empty files in a directory

Find: /new/$serve/properties-type f-size 0-exec rm-f {} \;

8. Delete files less than 10b in a directory

#Delete the files smaller than 10B for        i in ' ls-l. /new/$serve/properties/| Sed-e ' 1d ' | awk ' $ < {PRINT$NF} ' do        rm-rf.                /new/$serve/properties/$i done        

9, Linux through alias set shortcut command

Command () {list1= (' cat ~/.BASHRC | grep custom ') for ((i=0;i<=${#list1 [@]};i++));d o if [["${list1[i]}" = "#custom" ] then echo "[warn] the command had already been Initialized,there ' s no need to repeat the Operati                On, thank you! "                Break else path= ' pwd ' #初始命令 #Initialization commands. echo "#custom" >> ~/.bashrc echo "Alias l= ' Ll-al '" >> ~/.bashrc echo "Alias con f= ' CD ' echo $path '/. /conf ' ">> ~/.bashrc echo" Alias bin= ' CD ' echo $path '/. /bin ' ">> ~/.bashrc echo" Alias new= ' CD ' echo $path '/. /new ' ">> ~/.bashrc echo" Alias too= ' CD ' echo $path '/. /tools ' >> ~/.bashrc Echo ' Alias hostlist= ' cat ' echo $path '/. /tools/.hostlist ' ">> ~/.bashrc echo" Alias un= ' CD ' echo $path '/. /' ">> ~/.bashrc echo" Alias bak= ' CD ' ECHo $path '/. /bak ' ">> ~/.bashrc echo" Alias app= ' CD ' echo $path '/. /workapp ' >> ~/.bashrc Echo ' Alias. = ' CD. /' ">> ~/.BASHRC source ~/.BASHRC Fidone}

10. Referencing other shell scripting methods

# # # ====================================================#### Auth:wonter # # # # #                                         date:2014-06-12                                     # # Path: javame.cnblogs.com                             # # # # # # ====================================================###!/bin/sh# references tool.sh script methods ... /tools/tool.sh#parameterspar#capture ip#capture Pathconfig

11. Get the name of the script itself

#Automatically obtain Configuration Filesname= ' echo $ Uname= ' echo $name | Awk-f "/" ' {print $} ' | Awk-f "." ' {print $} ' #Uniform configurationserve= ' $uname '

12, check if there is a folder, no new folder

Bak_mk= ". /bak/$serve "new_mk=". /new/$serve "If [!-D $bak _MK]; Thenmkdir $bak _mkfiif [!-d $new _MK]; Thenmkdir $new _MKFI
Determine if the file is empty
If [-s $file]; Then

echo "Not Empty"
Fi

13. Statistical script Execution Time

st= ' date + '%y-%m-%d%h:%m:%s '
　　    #执行方法        start        en= ' date + '%y-%m-%d%h:%m:%s "'        st_c= ' date-d  " $st "+%s '        en_c= ' date-d  " $en "+%s '        interval= ' expr $en _c-$st _c '        Echo ' start start-up time   : ${st} '        echo ' Start end time        : ${en} ' C15/>echo "Total consuming time  : ${interval} Seconds"

14. Shell Definition Collection

#namelist1 = (' Cat.. /tools/list | Grep-v \# | awk ' {print '} ' | Sed "1,1d") #iplist2 = (' Cat. /tools/list | Grep-v \# | awk ' {print $} ' | Sed "1,1d") #servelist3 = (' Cat. /tools/list | Grep-v \# | awk ' {print $} ' | Sed "1,1d" ') for ((i=0;i<=${#list1 [@]};i++));d o        cp. /conf/.model. /CONF/${LIST1[I]}.CONF        CP. /bin/.model.wy. /bin/${list1[i]}.wy        CP. /bin/.model.yw. /bin/${list1[i]}.ywdone

15. Record the script performer user and IP

#Perform Operationecho "operator:" read mea= ' TTY | Awk-f "/dev/" ' {print $} ' date ' +%y-%m-%d%h:%m:%s ' >>. /logs/operation.logecho ' W | grep $a | awk ' {print $} ' "${me} > Perform operation:one" >>. /logs/operation.log

16. Regular statements in the shell

For i in ' Cat. /conf/$confs  | grep start | awk-f ">>" ' {print $} ' | awk-f "_" ' {print $} ' do        if [["${i}" = = "Shiro"]        then                sed-n-E '/>>shiro/,/>>shiro/p '  $confs |grep-v ' >>shiro ' > $pro _shi                cat $ Pro_shi | Col-b >. /temp/m1                Cat. /temp/m1 > $pro _shi        elif [["${i}" = = "jdbc"] "then                sed-n-E '/>>jdbc/,/>>jdbc/p '  $ Confs |grep-v ' >>jdbc ' > $pro _jdbc                cat $pro _jdbc | col-b > ... /temp/m1                Cat. /temp/m1 > $pro _jdbc        fi
Done

17, Shell write a timed process (not recommended I this writing, should have better!) ）

# # # ====================================================#### Auth:wonter # # # # # # # #                                         date:2014-06-12  timing.sh                                      # # # # # # ====================================================###!/bin/shecho "Please enter the timing threshold (format: ' Date + '%Y-%m- %d%h:%m "')"        read Timingecho "timed task set up, please rest assured ..." Ti () {while Truedo        time= ' date + "%y-%m-%d%h:%m" '        if [["${ Time} "= =" ${timing} "]" then                echo "timed task:"                #定时清理日志                rm-rf. /logs/*                #定时备份日志                #定时执行脚本                break        fidone}ti&

18. Execute script by parameter mode tools.sh

#!/bin/shtrust () {#建立信任echo "Please enter the Trust machine IP: (hint: You need to enter the password three times!) ) "Read Iptrusts}command () {#初始化命令command}case" $* "in        Trust)        Trust        ;;        command)        command        ;;        *)        echo "----------------------------------------"        echo "pls:http://javame.cnblogs.com  Welcome"        echo "----------------------------------------"        echo "  Host Trust     | or | Initialize command (initial)  "        echo" tools.sh Trust | or | tools.sh command "        echo"----------------------------------------"        ;; Esac

19, the terminal sends back the session to the other user limited root user

echo "Enter what you want to say:"
Read Spkecho $SPK >/dev/stdin >/DEV/PTS/2

20, a directory of all Files Unified Batch modification IP

Sed-i "  s/10.0.0.1/10.0.1.2/g" ' grep ' 10.0.0.1 '-rl/opt/uer/wy '

21. Number of links and number of processes

#链接数netstat-N | awk '/^tcp/{++y[$NF]} END {for (w in y) Print W, y[w]} ' #统计httpd协议连接数进程数ps-ef|grep httpd|wc-lps aux|grep httpd|wc-l# handle number L Sof-n|awk ' {print $} ' |sort|uniq-c|sort-nr|more #查看进程占用内存ps aux |awk ' ($ ~apache) && ($6>50) {print $} '

22. Three ways to view threads in Linux

1, top-h Manual said:-h:threads Toggle plus this option to start a top,top line to display a thread. Otherwise, it displays a process one line. 2, PS XH Manual said: H Show threads as if they were processes so that all existing threads can be viewed. 3, PS-MP <PID> Handbook said: M show threads after processes this allows you to see the number of threads that are in a process.

23. View the IP addresses that connect to a service port

Netstat-nat | grep "192.168.1.20:8443" |awk ' {print $} ' |awk-f: ' {print $4} ' |sort|uniq-c|sort-nr|head-20

24, common compression decompression name

25, thick accumulation of thin hair, continuous updating and accumulation, please pay attention to javame.cnblogs.com

1.gzexe-d decryption
2.Address 192.168.3.202 maps to Bogon, but this does is not a map back to the address-possible break-in attempt!
Workaround: Vim/etc/ssh/ssh_config Modify the Gssapiauthentication value to No
3. Print the specified line

Sed-n-i '/pid/,+600000000 P ' file

4.sed usage

Insert data in the first row sed-i 1 "i\\ $icare _ip" file only prints the third row sed-n ' 3p ' datafile only view the file line 100th to line No. 200 sed-n ' 100,200p ' files delete the second to fifth line sed ' 2,5d ' da Tafile Delete rows containing "2014-10-19" to rows that contain "2014-10-29" sed '/2014-10-19/,/2014-10-29/d ' datafile delete the content containing "My" to line tenth of the SED '/my/, 10d ' datafile
SED option-E for multiple edits
Sed-e ' 1,10d '-e ' s/my/your/g ' datafile

5. Interactive input

{echo "Who"} | SSH 192.168.48.73

Collections in 6.shell

List1= (' Cat.. /tools/list | Grep-v \# | awk ' {print '} ' | Sed "1,1d" ') for ((i=0;i<${#list1 [@]};i++));d Osh./${list1[i]}.wydone

7. Determine if there is

if [!-D $bak _MK]; Thenmkdir $bak _MKFI

8. For ^m

Dos2unix

9. Obtain the IP of the last login system

Last-n 5

10.AWK count the number of bytes in a file under a folder

Ls-l |awk ' BEGIN {size=0;} {size=size+$5;} End{print "[End]size is", size} ' [End]size is 8657198ls-l |awk ' BEGIN {size=0;} {size=size+$5;} End{print "[End]size is", size/1024/1024, "M"} ' [End]size is 8.25889 M

About Find search targeting:

11. File Name Search

12. Perform after lookup

Find./-name 192.168.48.154-exec cat > 1 {} \;

13. Delete empty files

Find./-type f-size 0-exec rm-rf {} \;

14. Find a file size of 0 or an empty directory

15. Check for files larger than 512k

16. Print multiple files to a file

Find./-name "[1-9].sh"-exec cat > 3 {} \;

17. Filter folders under Directory

18. Batch Modification

Find./-name "[1-9].sh"-exec sed-i s/0/9/g {} \;

19.-o equals and

Find./-name "1.sh"-o-name "2.sh"

20. Change in two days

21. Change within two minutes

Find/home-mmin-2

Files accessed within 22.10 minutes

Find/home-amin-10

Files accessed within 23.2 hours

Find/home-atime-2

24. Copy what you find out to another place

Find *.c-exec cp ' {} '/tmp '; '

25. Check that the/root directory is mounted on that disk partition

Df-h/root

26. Soft connection, Hard link

Ln-s/home/root/homeln-b/home/run.sh/root/run.sh

27. Unzip to the specified directory

Tar zxvf/filename.tar.zip-c/Home

28.VI Instruments

GG First line G last line d1g delete cursor line to first line DG DELETE cursor line to last line YY copy cursor line A at the last character of the cursor at the beginning of the Insert ZZ Save exit

29.^m garbled

Yum Install Dos2unix

30. Modify post-Linux login information

Vi/etc/motd

31. Timed Task Script

cmd= "cd/root/polling/bin/&&/root/polling/bin/run.sh" echo-n "*" >>/var/spool/cron/rootecho-n "6" > >/var/spool/cron/rootecho-n "*" >>/var/spool/cron/rootecho-n "*" >>/var/spool/cron/rootecho-n "*" >>/var/spool/cron/rootecho $cmd >>/var/spool/cron/root

32. Group Network Trust

{ECHO-E "\ n"} | Ssh-keygen-t rsa-p "Cp-r ~/.ssh/id_rsa.pub ~/.ssh/authorized_keyscd ~/.sshscp-r id_rsa.pub $ip:/root/.ssh/$ipssh $ip ' Touch ~/.ssh/authorized_keys && chmod 644 ~/.ssh/authorized_keys ' ssh $ip ' cat ~/.ssh/$ip >> ~/.ssh/ Authorized_keys "

33. About Shell Entry handling

$ A script name $ "Location parameter #1 $-$9 positional parameter #2-#9 ${10} position parameter #10 the number of $# positional parameters" $* "all positional parameters (as a single string) *" [email protected] "All positional parameters (each As a standalone string) ${#*} The number of command-line arguments passed to the script ${#@} The number of command-line arguments passed to the script? The return value of the $$ script's process ID (PID) $-passed to the script in the flag (using set) $_ the last parameter of the previous command $! Process ID (PID) of the last job running in the background

34. Using Cut slicing

echo 1:2:3 | Cut-d ': '-F 2echo 1:2:3 | Awk-f ': ' {' Print $ '}

35.egrep expansion

Cat 1.sh | Grep-v 5 | Grep-v 8cat 1.sh | Egrep-v ' 5|8 ' ls | Egrep ' lsit1.sh|tools.sh ' #可以同时查找多个egrep "Go?d" tools.sh #? One character * multiple characters

36.read Command with description

Read-p "uname:" Name

37.test command

#判断是否存在目录/Documents TEST-E/Home && echo OK | | Echo no["a" = = "ad"] && echo yes | | echo no# determine if parameters are equal test $a-eq $b && echo yes | | echo notest $a! = $b && echo yes | | echo no-eq equal-ne unequal test "d" = "D"-o "a" = "D" && echo yes | | Echo No-o and-A and

38. Process Tree

Ps-axjf

Linux Shell Mini Script Classic Collection