Unix script append to file

Learn more. How can I add a line to a file in a shell script? Ask Question. Asked 12 years, 11 months ago. Active 7 months ago. Viewed k times. I want to add a row of headers to an existing CSV file, editing in place. How can I do this?

Benjamin W. Add a comment. Active Oldest Votes. To answer your original question, here's how you do it with sed: sed -i '1icolumn1, column2, column3' testfile. Matthew Crumley Matthew Crumley Which version of Unix? I use Linux. If that works, I'll edit the answer. Thank you. I suspected this, but then I fail to make the i command work. I tried inline command without or with -e and script command with -f but I get: sed: rename : Not a directory.

Very good tutorial! But how can i append something at the end of a matched line? HI Please let me know the solution.. How can I do that? How to delete or append a line after a pattern match using SED? Can anyone please help! If the line does not match the pattern then goto L0 which prints the line.

If the line matches the pattern, then print the line first, extract the next line and delete it. Save my name, email, and website in this browser for the next time I comment. Notify me of followup comments via e-mail. All rights reserved Terms of Service. This article is part of the on going Unix sed command tutorial series. Sed provides lot of commands to perform number of operations with the lines in a file. Ramesh Natarajan December 10, , pm. Balast July 3, , pm.

Hi, How to insert content of file1 on the top of the file2, file3, file4, etc in same directory? Manish November 4, , am. Hi How I can escape Back slashes in sed. Anonymous December 1, , am. Balaji May 6, , am. David Liontooth June 18, , am. I nominate for the best set of sed instructions on the Internet. Join Date: Feb Stop and think, even if you don't see a temp file one has to be created. Because you cannot add bytes to the beginning of a file without overwriting what is already there.

Code :. Could even be simpler, although not sure if this si the intent. As you can see, the files could be combined without the use of a temp file. But, I guess the poster is looking for something different. Shell Programming and Scripting. Appending a text to the top of each line. Platform : Oracle Linux 6. The words after FROM clause below are table names. So, they Problem in appending text to a file located in remote server.

Appending a column of numbers in ascending order to a text file. I have a text file where I want to append a column of numbers in ascending orders. Input: 57 abc 25 def 32 ghi 54 jkl Output abc 57 abc 1 25 def 2 32 ghi 3 54 jkl 4 How do I go about doing that?

I am trying to count number of record in a file and then append a trailer to that file.