Quickly Output Lines in a File

The other day I wanted a shell command to have somebody print out the 671st line of /etc/services on their computer. So I gave it some thought, then some more thought, scratched my head, and figured out that I couldn’t really think of a shell command that does that. A google search came up with a few `sed` and `awk` examples but I honestly found those to be a bit awkward for something that should be super simple. So I wrote my own script.

After writing the script to print out a single line, I soon found it made a lot of sense to include ranges. Taking advantage of Ruby I can even print lines from the end with negative numbers. So I spent a few minutes to clean up the script and make it a little more reusable, add some formatting, and cleaner. Here was the result:

line sample usage

line is now the latest addition to my ~/bin.

Also, in case you wanted to use this in a shell script or via piping, there is a `–silent` or `-s` switch that you can use that removes all of the special formatting, and prints only the specified lines. Much nice for scripts. (See the highlighted line in the image below). Enjoy!

line source

So what exactly is line 671 of /etc/services? On my mac it is:

line 671 of /etc/services

Add a Comment

search