I have a text file with the following format. The first line is the “KEY” and the second line is the “VALUE”. KEY 4048:1736 string 3 KEY 0:1772 string 1 KEY 4192:1349 string 1 KEY 7329:2407 string 2 KEY 0:1774 string 1 I need the value in the same line as of the key. So … Read more
I have a script file which I need to modify with another script to insert a text at the 8th line. String to insert: Project_Name=sowstest, into a file called start. I tried to use awk and sed, but my command is getting garbled. 11 Answers 11
I want to print the second-to-last column or field in awk. The number of fields is the NF variable. I know that I should be able to use $NF, but I’m not sure how it can be used. And this does not seem to work: awk ‘ { print ( $NF– ) } ‘ 9 … Read more
I want the variable sum/NR to be printed side-by-side in each iteration. How do we avoid awk from printing newline in each iteration ? In my code a newline is printed by default in each iteration for file in cg_c ep_c is_c tau xhpl printf “\n $file” >> to-plot.xls for f in 2.54 1.60 800 … Read more
My command’s output is something like: 1540 “A B” 6 “C” 119 “D” The first column is always a number, followed by a space, then a double-quoted string. My purpose is to get the second column only, like: “A B” “C” “D” I intended to use <some_command> | awk ‘{print $2}’ to accomplish this. But … Read more
Let’s say that during your workday you repeatedly encounter the following form of columnized output from some command in bash (in my case from executing svn st in my Rails working directory): ? changes.patch M app/models/superman.rb A app/models/superwoman.rb in order to work with the output of your command – in this case the filenames – … Read more
I have a file which contains several thousand numbers, each on it’s own line: 34 42 11 6 2 99 … I’m looking to write a script which will print the sum of all numbers in the file. I’ve got a solution, but it’s not very efficient. (It takes several minutes to run.) I’m looking … Read more
How to split the string when it contains pipe symbols | in it. I want to split them to be in array. I tried echo “12:23:11″ | awk ‘{split($0,a,”:”); print a[3] a[2] a[1]}’ Which works fine. If my string is like “12|23|11” then how do I split them into an array? 12 Answers 12
I have a file which contain following lines: /logs/tc0001/tomcat/tomcat7.1/conf/catalina.properties:app.env.server.name = demo.example.com /logs/tc0001/tomcat/tomcat7.2/conf/catalina.properties:app.env.server.name = quest.example.com /logs/tc0001/tomcat/tomcat7.5/conf/catalina.properties:app.env.server.name = www.example.com In above output I want to extract 3 fields (Number 2, 4 and the last one *.example.com). I am getting the following output: cat file | awk -F”https://stackoverflow.com/” ‘{print $3 “\t” $5}’ tc0001 tomcat7.1 tc0001 tomcat7.2 tc0001 tomcat7.5 … Read more
grep -A1 ‘blah’ logfile Thanks to this command for every line that has ‘blah’ in it, I get the output of the line that contains ‘blah’ and the next line that follows in the logfile. It might be a simple one but I can’t find a way to omit the line that has ‘blah’ and … Read more
