Comments on: Holiday Giveaway: Win Learning Nagios 3.0 Book

By: Bob M

Bob M — Wed, 24 Dec 2008 21:28:17 +0000

I know the contest is over but here is command that I think is a pretty good way of taring up a directory and transferring the file to a remote system in one step:

tar zcvf – /some-filesystem | ssh user@some-machine “cat > /tmp/test.tar.gz”

Saves me time of not having to wait for the tar process to finish and then scp it over to the remote system.

By: The Geek Stuff » Holiday Giveaway Winners for Learning Nagios 3.0 Book

The Geek Stuff » Holiday Giveaway Winners for Learning Nagios 3.0 Book — Wed, 24 Dec 2008 06:03:23 +0000

[...] part of Holiday Giveaway contest, I’ve asked you to share your favorite Unix command and a sample usage. Following are three [...]

By: Peter VG

Peter VG — Mon, 22 Dec 2008 18:01:19 +0000

We needed a script that had to remove from a directory all files except for a specific number of file names. This directory was filled by another script that extracted attachments from emails that were received on a dedicated email address. Finally a print script toke the valid attachments and printed them, afterwards removed them. Since it was a public email address a lot of garbage was unavoidable and as a result also a lot of garbage attachments. To remove the garbage attachments I used a “remove except for …” command:

find . -type f ! $ -name ‘FA*’ -o -name ‘DE*’ -o -name ‘*.pdf’ -o -name ‘m2t*.wrk’ $ -exec rm {} \; > /dev/null 2>&1

This command removes all files except for files with name “FA*”, “DE*”, “*.pdf” and “m2t*.wrk”.

By: Jimmy M

Jimmy M — Mon, 22 Dec 2008 10:22:13 +0000

After all the operating systems I have used I have come across one command that simplifies everything from confusion to light. Some might take it lightly but these simply comand will make all linux jargon come to light.

apropos *anything*

this will give you a quick discription of the command or instruction you want to know. sub *anything* with any command eg. man , shell, gcc, shutdown. enjoy

By: Siva

Siva — Fri, 19 Dec 2008 13:28:51 +0000

Hi
My favorite Linux Commaind : Nmap

My fav Editor – Vim

Siva

By: Thierry

Thierry — Fri, 19 Dec 2008 10:59:00 +0000

hands down the following or how to remove ALL the .tmp files in one go. Can be obviously adapted for other file types or modified to one’s heart’s content.

ls | grep .tmp | xargs rm -f

By: nippip

nippip — Fri, 19 Dec 2008 03:06:01 +0000

many of my favorites have been already mentioned but one that I use for trouble shooting a process is;

strace -p

This will throw to stdout what the process is actually doing or not doing which can be very helpful.

By: valqk

valqk — Thu, 18 Dec 2008 20:12:22 +0000

@unixthirst
you can simply add an alias cspah forexample that does cd /long/path/here
alias cspath=’cd /long/path/here’ in sh(bash)
@Flynets
you can simply do
for k in *.jpg instead of calling ls

instead of -print|xargs rm
you can simply call -delete (work’s on most linuxes, depends on find version. on debian 4 works, on debian 3 not)…
I couldn’t stopped myself posting this.
sorry.

By: Flynets

Flynets — Thu, 18 Dec 2008 16:53:01 +0000

My best tips:

for vim : Replace Unix carriege (^M) – :%s/\r/\r/g

for shell:

- Remove backup files = find -iname “*~” -print|xargs rm
- Replace space character =
find . -type f -iname “*.mp3″ -exec rename “s/ /_/g” {} \;
- Resize and create new pictures with covert command (ImageMagick) =
for k in $(ls *.jpg); do convert -resize 800 -quality 80 $k r800-$k; done
- Resize pictures with mogrify command (ImageMagick) =
for k in $(ls *.jpg); do mogrify -resize 800 -quality 80 $k ; done

happy coding

By: unixthirst

unixthirst — Thu, 18 Dec 2008 12:34:10 +0000

CDPATH

It is one of a simple and very useful hacker, learnt from this blog.

export a CDPATH to a 4th level directory which i would use it often as,
export CDPATH=/a/b/c/d/

Using which i can go to the 4th level directory simply, without keying in all those dir names…..

read http://www.thegeekstuff.com/2008/10/6-awesome-linux-cd-command-hacks-productivity-tip3-for-geeks/