shell script to parse /etc/passwd file and place it as input How to find a user is present or not # grep -i 'avahi' /etc/passwd avahi-autoipd:x:170:170:Avahi IPv4LL Stack:/var/lib/avahi-autoipd:/sbin/nologin avahi:x:70:70:Avahi mDNS/DNS-SD Stack:/var/run/avahi-daemon:/sbin/nologin The above command will grep for the user avahi and will grep the lines present in the server or /etc/passd file. Cut ..
shell script to add DNS or host entry in /etc/hosts The below scrip will search for the given IP and the DNS or host in /etc/hosts file # Declare the ip which you want to add ip="127.0.0.1" # Execute grep command to find IP and store it ..
How to find domain expire date for list of domains? Sometime it is necessary to find the list of domain expiration date, which are hosted by you, To do so the below script will help you to find the domain expiration date. cat listdomain.txt | while read line; do ..
for dir in $(find -type d ! -name CVS); do for file in $(find $dir -maxdepth 1 -type f); do rm $file; cvs delete $file; done; done This will search all directories and ignore the CVS ones. Then it ..
goclearanalytics() { echo "DELETE FROM moz_cookies WHERE name LIKE '__utm%';" | sqlite3 $( find ~/.mozilla -name cookies.sqlite ) } See, http://code.google.com/apis/analytics/docs/concepts/gaConceptsCookies.html if you are unclear about the Google Analytics cookie system. If Firefox is your daily browser, be a good Orwellian and run this command regularly. If you see, 'SQL error near ..
For loop in bash script Use the below code to print the particular string for 100 times using for loop Create hello.sh file echo $0 n=$1 for(( i = 1 ; i <=100 ; i++ )) do echo "$i $n " done Execute hello.sh file sh hello.sh mylove Output 1 mylove 2 mylove 3 mylove ........ ........ 100 mylove The above program will print mylove for 100 ..
Use the below code to concate two strings. Example var='My' var="${var}love" echo $var Output Mylove ..
Pass argument with double quotes If you want to pass argument with double quotes just follow the below step Create file as hello.sh and type as echo $1 Execute file as sh test.sh 'pp"' Output pp" Other way to Pass argument with double quotes is Execute file as sh hello.sh pp\" Execute file as ..
Pass argument with single quotes If you want to pass argument with single quotes just follow the below step Create file and type as echo $1 Execute file as sh hello.sh "pp'" Output: pp' Pass argument with single quotes sh hello.sh pp\' Execute file as above to pass the argument with single quote. ..
How to comment multiple lines in shell script <<COMMENT1 //Your codes here COMMENT1 (or) <<comment1 //Your codes here comment1 Comment Multiple lines in shell script to comment multiple lines. Comment a particular line or single line If you want to comment the particular line use the # symbol. # Your code This will comment the line your code. ..
Comment the particular line If you want to comment the particular line use the # symbol. How to comment multiple lines in shell script <<COMMENT1 //Your codes here COMMENT1 (or) <<comment1 //Your codes here comment1 Comment Multiple lines in shell script to comment multiple lines. ..
Increment operation Use the below code to increment the particular variable. gg=0 gg=`expr $gg + 1` echo $gg expr command is used to increment the particular variable. ..
How to execute shell script Create file with extension as .sh Example: hello.sh echo $0 Execute File as # sh hello.sh Output of the above program is hello.sh ..
Purge frozen messages in Exim # exipick -zi | xargs exim -Mrm The above command will delete all the frozen message in exim mail server. This command will be very much helpful when your exim mail server is frozen by mails. Delete frozen mails for i in `mailq | awk '$6 ~ ..
Linux is a free open-source operating system based on Unix. Linus Torvalds originally created Linux with the assistance of developers from around the world. Linux is: => Free => Unix Like => Open Source => Network operating system ..