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.


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.
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:

Hide

News

May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!
Hide

Top Tags

Hide

Functions

Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Fastest Sort. Sort Faster, Max Speed

Terminal - Fastest Sort. Sort Faster, Max Speed
alias sortfast='sort -S$(($(sed '\''/MemF/!d;s/[^0-9]*//g'\'' /proc/meminfo)/2048)) $([ `nproc` -gt 1 ]&&echo -n --parallel=`nproc`)'
2012-02-28 01:34:58
User: AskApache
Functions: alias sed
3
Fastest Sort. Sort Faster, Max Speed

sort is way slow by default. This tells sort to use a buffer equal to half of the available free memory. It also will use multiple process for the sort equal to the number of cpus on your machine (if greater than 1). For me, it is magnitudes faster.

If you put this in your bash_profile or startup file, it will be set correctly when bash is started.

sort -S1 --parallel=2 <(echo) &>/dev/null && alias sortfast='sort -S$(($(sed '\''/MemF/!d;s/[^0-9]*//g'\'' /proc/meminfo)/2048)) $([ `nproc` -gt 1 ]&&echo -n --parallel=`nproc`)'

Alternative

echo|sort -S10M --parallel=2 &>/dev/null && alias sortfast="command sort -S$(($(sed '/MemT/!d;s/[^0-9]*//g' /proc/meminfo)/1024-200)) --parallel=$(($(command grep -c ^proc /proc/cpuinfo)*2))"

Know a better way?

If you can do better, submit your command here.

What others think

Using so much mem is dangerous.

Also using more processes than CPUs suggests you're waiting on disk. It would help if you mentioned your input source medium, TMPDIR medium and output medium.

Note also the recent nproc command which might be handier than grepping cpuinfo

Note also this might be a safer mem usage estimate:

free -m | awk '$4 && $7 {print $4+$7-200}'

Comment by pixelbeat 248 weeks and 2 days ago

Thanks for that nproc command and I like the way your command includes the cache... Also good mention of the TMPDIR medium and output medium since these are heavily used. My tmpdir is either tmpfs (memory) or on a high-performance 6-disk raid 0 array.. both max out at 5GB size-wise. I use a custom TMPDIR so didn't include that, but really will make a huge difference if setup correctly.

This has 8 subprocesses and 302 calls

strace -c sh -c "free -m | awk '\$4 && \$7 {print \$4+\$7-200}'"

This has 297 calls and 8 subproccesses

strace -c sh -c "free -m|sed '1d;s/^.*: *[0-9]* *[0-9]* *//;s/ [ 0-9]*$//;q'"

This has no subprocesses and only 192 calls

strace -c sh -c 'sed -n "/mF/s/^.*: *\([0-9]\+\) kB$/\1/p" /proc/meminfo'

I will update the above with the changes made per your suggestions.

Comment by AskApache 245 weeks and 5 days ago

Ok there you go.. what do you think of that? Any other ideas?

Comment by AskApache 245 weeks and 5 days ago

2016-6-7 leilei

"Tweed is an excellent fabric especially when you are living in place like London. London is known for its cold weather and in such climate, tweed works absolutely fine. One of the biggest advantages of buying a tweed suit is that you it can be worn all together or can be incorporated separately into pieces in your wardrobe. Tweed suits in London is quite famous amongst men. So let us understand, what exactly tweed fabric is.

What is Tweed?

Tweed is a warm rough to touch fabric and was originated in Scotland. The reason why tweed suits in London are famous is because of its loose weave which makes it flexible and comfortable during winters. The tweed fabric is referred to the weave of fabric; therefore when you see different kinds of tweed, it would tell you the pattern it has been woven. One of the most popular kinds of tweed is the herringbone tweed which a diagonally v-shaped black and white weave. The herringbone tweed gives a rich visual texture and known for its versatility.

Ways to wear Tweed in winters

Everybody needs to wear warm clothes during the winter month to protect from the chilly weather outside. However, many people think that they might have to compromise fashion during those chilly months. Not now! There are many fabrics that you can use to protect yourself from the weather as well as still enjoy great looks. Tweed is one of the fabrics that can make you awesome even in winters as well. Below are some ways of how you can incorporate tweed with other pieces in your wardrobe

"

http://www.raybanssunglasses.us.org

http://www.poloralphlaurenmen.name

http://www.burberrysale.me.uk

http://www.nike-airmax90.me.uk

http://www.ralph-lauren-pas-cher.fr

http://www.yeezyboost-350.us.com

http://www.jordan-femmepascher.fr

http://www.airmaxoutletsaleus.com

http://www.cheapmlbjerseys.us

http://www.adidas-shoes.me.uk

http://www.basketballshoes.net.co

http://christianlouboutin.eshopping.us.com

http://www.airmax90.org

http://www.cheapfakeoakleysoutlet.com

http://www.designerhandbags.net.co

http://www.airjordan-uk.org.uk

http://www.levisjeans.name

http://www.fitflopssaleclearance.net

http://www.pradaoutlet.name

http://www.yeezyboost350.me.uk

http://www.michael-korshandbagsoutlet.us.com

http://www.louisvuittonoutletonline.us.org

http://www.coachfactoryoutlet-online.com.co

http://www.hollisterclothingstore.com.co

http://www.abercrombieandfitchoutlet.name

http://www.rayban-outletstoreonline.com

http://canadagoose.shopgioia.com

http://www.ghdflatiron.com

http://www.christianlouboutinoutlet.us

http://www.kobeshoes.name

http://www.pandorajewelryoutlet.name

http://www.birkenstocks.name

http://www.longchampoutlet.net.co

http://www.truereligionjeans.me.uk

http://www.chaussure-louboutin.fr

http://www.coachfactoryoutletonline.us.org

http://www.louisvuittonoutlet.ca

http://www.adidasnmd.org.uk

http://www.tiffanyjewelryoutlet.name

http://www.michaelkorsoutletclearance.net.co

http://www.louboutin.eu.com

http://www.yeezyboost.us.com

http://www.thenorthfaceoutlet.com.co

http://www.montblancoutletpens.com

http://coach.eshopping.us.com

http://www.cheap-nbajerseys.us.com

http://www.thenorthface.org.uk

http://www.ralphlauren-outlet.com.co

http://ralphlauren.shopgioia.com

http://www.kate-spadeoutlet.com.co

http://www.adidasgazelle.me.uk

http://www.gucci-borse.it

http://www.tomsoutletstores.in.net

http://ugg.eshopping.us.com

http://oakley.shopgioia.com

http://www.raybans.org.uk

http://www.fitflops.in.net

http://www.cheapraybansunglassesoutlet.us.com

http://www.skechersshoes.us

http://www.supraforsale.in.net

http://www.buyredbottomcheapshoesonline.com

http://www.oakley-sunglasses.us.com

http://www.fitflopuk.me.uk

http://www.burberry-outlet-canada.ca

http://www.discountnikeshoessc.org

http://www.truereligionjeansoutlet.name

http://www.nfl-jerseys-wholesale.us.com

http://www.toryburchoutlet.org

http://www.cheapjordans-shoes.us.com

http://www.vansshoes.in.net

http://www.raybansunglassesoutlet.in.net

http://www.nikefreerun.name

http://www.adidas-nmd.us.com

http://www.fitflops.us

http://www.truereligionoutlet.com.co

http://www.asicsshoes.in.net

http://www.new-balanceoutlet.us

http://www.edhardy-outlet.name

http://www.toms.in.net

http://www.armani-exchange.us

http://www.michaelkors-outlet.us.org

http://www.birkenstocksandals.us.com

http://www.instylermax.in.net

http://www.michael-korsoutlet.ca

http://www.underarmourshoes.cc

http://www.puma-shoes.in.net

http://www.oakley--sunglasses.us.org

http://www.omegawatches.name

http://www.niketrainers.com.co

http://www.coachoutletstoreonlineclearances.in.net

http://www.nike-airmax.org.uk

http://www.tiffanyandco.name

http://www.adidas-trainers.me.uk

http://www.katespadehandbags.net.co

http://www.birkenstocksandals.org.uk

http://www.raybans.in.net

http://www.tiffanyandcojewelry.org.uk

http://www.nikestoreuk.me.uk

http://www.ralphlaurenoutletuk.me.uk

http://www.oakley.nom.co

http://www.polooutlet.us.com

http://burberry.eshopping.us.com

http://www.diorsunglasses.us

http://www.michaelkorsoutletvip.in.net

http://www.ralphlaurenoutlet.us.org

http://www.longchampbag.co.uk

http://www.eccoshoes.us

http://www.pandoracharmsuk.org.uk

http://www.edhardyukclothing.me.uk

http://www.nike-tn-pascher.fr

http://www.coachfactoryonlineoutlet.com.co

http://www.louisvuitton-sac-pascher.fr

http://burberry.shopgioia.com

http://www.michaelkorshandbagsuk.me.uk

http://www.lacosteshoes.us

http://www.coachpursesoutlet.in.net

http://www.louisvuittonfactoryoutlet.us.com

http://www.michaelkorspurses.in.net

http://www.adidassuperstar.co.uk

http://www.ferragamoshoes.cc

http://www.rayban--outlet.com

http://www.true-religionjeans.net.co

http://www.nike-blazerlow.fr

http://www.cheapoakleysunglassesoutlet.us.com

http://www.louisvuittonoutletonlines.us.com

http://www.coachoutletstoreonline.com.co

http://www.raybansunglassesdiscount.us.com

http://www.reebokclassic.me.uk

http://abercrombie.shopgioia.com

http://www.kate-spadeoutlet.in.net

http://www.bottegaveneta.in.net

http://www.oakleysunglassesuk.org.uk

http://www.kate-spadeoutlet.us

http://canadagoose.eshopping.us.com

http://www.prada-sunglasses.us.com

http://www.louisvuittonoutlets-lv.com

http://ralphlauren.eshopping.us.com

http://www.hollisterclothing.org

http://www.poloralphlaurenoutletonlines.us.com

http://www.saclongchamp-solde.fr

http://www.louisvuittonhandbagsuk.me.uk

http://christianlouboutin.shopgioia.com

http://www.michaelkorsoutletclearance.com.co

http://www.adadasstansmith.com

http://www.nikerosherunwomen.me.uk

http://www.guccihandbagsoutlet.org

http://www.airmax95.org.uk

http://www.versace-sunglasses.us.com

http://www.versaceshoes.in.net

http://www.sac-longchamppliage.fr

http://www.michaelkorswatches.co.uk

http://www.michaelkors-outlet.ca

http://www.runningshoes.com.co

http://www.michaelkorsoutletonline.com.co

http://www.poloralphlauren.net.co

http://www.coach-outletonline.us.org

http://www.rolex-replicawatches.com.co

http://www.christianlouboutinuk.me.uk

http://www.pandorajewelryoutlet.org

http://www.nikefreeruns.uk

http://www.rolexwatchesuk.me.uk

http://www.nikefreeflyknit.name

http://www.adidasnmd.us.org

http://www.michaelkorsoutlet.net.co

http://www.mizunorunningshoes.in.net

http://www.michaelkorsoutletonlineclearance.us.com

http://www.cheapjordans.com.co

http://rayban.shopgioia.com

http://www.michael-kors-outlet.ca

http://www.michaelkorsoutlet-online.us.org

http://rayban.eshopping.us.com

http://www.katespadehandbags.org.uk

http://www.hollistersaleuk.me.uk

http://www.conversetrainer.co.uk

http://www.adadassupercolor.com

http://oakley.eshopping.us.com

http://www.fitflopssaleclearance.com

http://www.babylisspro.in.net

http://www.hermesbelt.in.net

http://www.cartierwatches.cc

http://www.timberlandbootsoutlet.name

http://www.pandoracharms.com.co

http://www.christianlouboutinshoes.org.uk

http://www.nikehuarache.com.co

http://www.jimmychoo.in.net

http://www.reebokshoes.in.net

http://www.discountoakleysunglasses.us.org

http://www.nikecortez.com.co

http://www.raybans.us.com

http://www.michaelkorshandbagsoutlet.in.net

http://www.hollisteruksale.org.uk

http://www.coach-outletonline.eu.com

http://www.louisvuitton-borse.it

http://www.stephencurryshoes.net

http://michaelkors.eshopping.us.com

http://www.cheap-jordans.us

http://www.coachfactoryoutletstoreonline.com

http://www.adidaspureboost.us

http://www.tomsshoes.us.com

http://www.airforce1-nike.fr

http://www.lebronjamesshoes.org

http://ugg.shopgioia.com

http://www.cheap-jerseyswholesale.us

http://www.chaussurelouboutin-pascher.fr

http://www.michaelkors-outlet.us.com

http://www.converseshoes.in.net

http://www.nikeairforce1.org.uk

http://www.coach-outletonlines.us.com

http://www.rolexdaytona.in.net

http://www.hermesuk.org.uk

http://www.nikefreeflyknit.org.uk

http://www.timberlandbootsuk.org.uk

http://hollister.shopgioia.com

http://www.adadassuperstar.com

http://www.sunglassesoakley.in.net

http://www.cheapnhljerseyswholesale.us

http://www.valentino.in.net

http://www.chiflatiron.in.net

"Casually ? if you are a starter with tweed then it is recommended to start with plain variety of tweed. You can wear a tweed jacket with dark blue jeans and high boots. Incorporate a neutral t-shirt or a winter shirt under the jacket.

At work ? Tweed suit in London are quite popular as one of the formal attires. Heavy woven tweeds can make you look older, so try buying tweed suits in London that are finely weaved and pair it with your regular shirts like white or blue with smart formal shoes. Believe it or not, it can win you praise at work.

Accessorise ? Apart from wearing tweed suits in London as attire you can even use accessories made out of tweed. Tweed caps, laptop bags, scarves, gloves are a smart way to incorporate tweed in your winter collection. It is also a safe way of using tweed fabric if you are not too comfortable wearing it. There is even footwear that has tweed as their centre fabric and looks awesome.

Taking care of Tweed

Though the fabric boasts itself about being tough and rugged, it still requires a good care to use it for coming years as well. Due to its weave structure it often pick up dirt and stains that can get hard to remove. Make sure you take your tweed clothes for dry cleaning as washing them in washing machines can make them shrink. Also, keep them in cool dry place so that they do not get attracted by moths.

"

Comment by leilei3915 25 weeks and 4 days ago

Your point of view

You must be signed in to comment.