Hide

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.

OpenID

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

Hide

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:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands using vmstat

Hide

News

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.

Hide

Functions

Hide

Credits

Site by David Winterbottom (user root).

Commands using vmstat

Terminal - Commands using vmstat - 8 results

watch vmstat -sSM

2011-06-16 18:02:24

User: 0disse0

Functions: vmstat watch

Tags: vmstat watch

Up
Down

monitor memory usage

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

while (true); do clear; uname -n; echo ""; df -h /; echo ""; tail -5 /var/log/auth.log; echo ""; vmstat 1 5; sleep 15; done

2010-08-23 04:37:58

User: roknir

Functions: df echo sleep tail uname vmstat

Up
Down

Continually monitor things

You can use this one-liner for a quick and dirty (more customizable) alternative to the watch command. The keys to making this work: everything exists in an infinite loop; the loop starts with a clear; the loop ends with a sleep. Enter whatever you'd like to keep an eye on in the middle.

watch vmstat -sSM

2009-12-04 22:35:45

User: servermanaged

Functions: vmstat watch

Up
Down

Monitor memory usage

Monitor with watch command and vmstat, memory usage

(echo "set terminal png;plot '-' u 1:2 t 'cpu' w linespoints;"; sudo vmstat 2 10 | awk 'NR > 2 {print NR, $13}') | gnuplot > plot.png

2009-09-23 16:40:13

User: syssyphus

Functions: awk echo sudo vmstat

Tags: awk vmstat gnuplot

Up
Down

Visualizing system performance data

Comments (6) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

vmstat 2 10 | awk 'NR > 2 {print NR, $13}' | gnuplot -e "set terminal png;set output 'v.png';plot '-' u 1:2 t 'cpu' w linespoints;"

2009-09-23 07:19:47

User: Sunng

Functions: awk vmstat

Tags: awk vmstat gnuplot

Up
Down

Visualizing system performance data

draw `vmstat ` data using gnuplot

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

vmstat 1 | awk '{now=strftime("%Y-%m-%d %T "); print now $0}'

2009-07-17 07:41:57

User: inevitability

Functions: awk vmstat

Up
Down

vmstat/iostat with timestamp

Also useful with iostat, or pretty much anything else you want timestamped.

vmstat 1 10 | /usr/xpg4/bin/awk -f ph-vmstat.awk

2009-05-04 04:55:00

User: MarcoN

Functions: vmstat

Tags: solaris awk vmstat

Up
Down

Replace Solaris vmstat numbers with human readable format

% cat ph-vmstat.awk

# Return human readable numbers

function hrnum(a) {

b = a ;

if (a > 1000000) { b = sprintf("%2.2fM", a/1000000) ; }

else if (a > 1000) { b = sprintf("%2.2fK", a/1000) ; }

return(b) ;

}

# Return human readable storage

function hrstorage(a) {

b = a ;

if (a > 1024000) { b = sprintf("%2.2fG", a/1024/1024) ; }

else if (a > 1024) { b = sprintf("%2.2fM", a/1024) ; }

return(b) ;

}

OFS=" " ;

$1 !~ /[0-9].*/ {print}

$1 ~ /[0-9].*/ {

$4 = hrstorage($4) ;

$5 = hrstorage($5) ;

$9 = hrnum($9) ;

$10 = hrnum($10) ;

$17 = hrnum($17) ;

$18 = hrnum($18) ;

$19 = hrnum($19) ;

print ;

}

while [ 1 ]; do echo -n "`date +%F_%T`" ; vmstat 1 2 | tail -1 ; sleep 4; done

2009-03-26 19:16:55

User: plasticboy

Functions: echo sleep tail vmstat

Tags: vmstat monitoring

Up
Down

Output system statistics every 5 seconds with timestamp

See man vmstat for information about the statistics.

This does the same thing without the timestamp:

vmstat 5