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I have some command which produces output with no new line at the end, like this

Myprompt$ somecmd
dksfjdl
dsfjdlkfj
dsfjdkfj
dfjdkfjMyprompt$

Currently I overcome this by somecmd | sed 's/$/\n/' | tr -s '\n' Is there a better way to do this?

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2 Answers 2

up vote 10 down vote accepted

Just run echo after it, it should generate a newline

Myprompt$ somecmd ; echo

And If you need to feed it to something else, run it in a sub-shell:

Myprompt$ ( somecmd ; echo ) | someothercmd

Or.. as @camh points out, the subshell is actually not needed you can execute it with a command list in the current shell environment with:

Myprompt$ { somecmd ; echo ; } | someothercmd
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3  
A subshell is not needed. You can just do { somecmd ; echo ; } | someothercmd –  camh Jan 13 '11 at 12:50
    
Then I'll shamelessly incorporate your better solution into my answer :) –  Kjetil Jorgensen Jan 13 '11 at 12:56
    
Thanks. Can you explain what this does { somecmd ; echo ; } . I understand how the subshell worked. Where should I read about this? –  balki Jan 14 '11 at 7:34
1  
If you're wondering about the { list; } form, see the "Compound Commands" section of the manual page for bash. It executes a command-list in the current shell environment. The reason we use echo at the end is just to append a newline, by default echo emits a trailing newline. The reason we use the { list; } form has to do with the way bash parses and sets up redirections/pipes. somecmd; echo | someothercmd, will just connect a pipe between echo and someothercmd. With the compound command, the entire command list will have it's stdout connected with a pipe to someothercmd. –  Kjetil Jorgensen Jan 14 '11 at 10:43

Feed it through some utility which read input in lines and output lines, like in awk { print $0 }.

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