What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Universal configuration monitoring and system of record for IT.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:



2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.




find all minimum values in file with at least 100 lines

Terminal - find all minimum values in file with at least 100 lines
for ff in directory; do numLines=`wc -l $ff`; numLines=$(echo $numLines | sed 's/ .*//g'); min=$(sort -nrk 1 $ff | tail -1); if [ $numLines -gt 100 ]; then echo $min >> minValues; fi;done;
2013-09-23 04:04:52
User: user1234
Functions: echo sed sort tail
find all minimum values in file with at least 100 lines


There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Hmm... This could do with some tidying up.

First, I'd replace `wc -l $ff` with $(wc -l $ff)

It uses one more character, but $(...) can be nested and `...` cannot.

It's tempting to fold the two numLine assignments:

numLines=$(wc -l $ff | sed 's/ .*//g')

but I'd prefer to use bash and get rid of sed:

numLines=$(wc -l $ff) numLines=${numLines% *}

To save time, it's better to check the file length FIRST.

Currently, you sort all the small files, then ignore the result:

[ $numLines -lt 100 ] && continue

Now, you don't need the min variable any more:

sort -nrk 1 $ff | tail -1 >> minValues

Next, I'd change that sort line again.

Currently, it writes to 'minValues' one line at a time.

If you've got a LOT of files, it'd be more efficient to do:

sort -nrk 1 $ff | tail -1 done >> minValues

Finally, I'd quote the "$ff" just in case the filenames have whitespace in them.

for ff in directory/*; do numLines=$(wc -l "$ff"); numLines=${numLines% *}; [ $numLines -lt 100 ] && continue; sort -nrk 1 "$ff" | tail -1; done >> minValues

188 characters down to 157 :-)

Minimising it fully:

for f in directory/*;do n=$(wc -l "$f");n=${n% *};[ $n -lt 100 ]&&continue;sort -nrk 1 "$f"|tail -1;done>>minValues

115 characters

Comment by flatcap 78 weeks and 5 days ago

And... :-)

Swap &&continue;sort for ||sort

for f in directory/*;do n=$(wc -l "$f");n=${n% *};[ $n -lt 100 ]||sort -nrk 1 "$f"|tail -1;done>>minValues

106 characters

Comment by flatcap 78 weeks and 5 days ago


Share a website with you ,

( http://www.shoes2.us// )

Believe you will love it.

We accept any form of payment.


Comment by shoesus53 78 weeks and 4 days ago

Your point of view

You must be signed in to comment.