Unix and Linux Tips: Desember 2009

Minggu, 20 Desember 2009

Unix Tip: SPACES TO UNDERSORE 1 LINER

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3240 - December 20, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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SPACES TO UNDERSORE 1 LINER

Do you hate users who put spaces in file names, preventing you from doing any sort of scripting?

Well then this is the little one-liner for you to pop in a shell script then...

for i in $1 ; do mv "$i" `echo $i | sed 's/ /_/g'` ; done

the echo $i | sed 's/ /_/g' is surrounded by back-tics not regular quotes.

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Sabtu, 19 Desember 2009

Unix Tip: NEW TIP BETTER THAN OLD TIP!

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3239 - December 19, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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NEW TIP BETTER THAN OLD TIP!

Sorry about the Y2K tip, we have been testing a new Tip mailer. Hated it!
Here is the real tip that was suppose to go out today:

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WALK THE CUBES

Some times at work there are dry periods when the users don't call. Walk the halls even if there is nothing to do. Being seen by users makes them feel that you are always around for them.

Some users are hesitant to call at times, and some feel you are never around to help. When you walk the area ask different users each time if everything is alright. A simple way to stay proactive.

Also, if you charge your time back to a department, make sure that you walk past managers offices. They will feel that you are there to work on the employees problems and they're being well taken care of. Even if everythig is okay, and they ask what the problems are, let them know you are there because you care.

Alittle TLC goes along ways.

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Jumat, 18 Desember 2009

Unix Tip: REGULAR EXPRESSION FOR FLOATING POINT NUMBER

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3238 - December 18, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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REGULAR EXPRESSION FOR FLOATING POINT NUMBER

This the Regular expression for floating point numbers and this can be used with grep or egrep for searching floating point numbers in any text file.

(\+|-)?([0-9]+\.?[0-9]*|\.[0-9]+)([eE](\+|-)?[0-9]+)?

This tip generously supported by: udayk@india.hp.com

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Kamis, 17 Desember 2009

Unix Tip: CHANGING PERMS RECURSIVELY

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3237 - December 17, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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CHANGING PERMS RECURSIVELY

*** NOTE: Odly enough, the previous mailing of this tip did not go through do to a permissions problem. Sorry.

To change permissions recursively for all files in a directory

find dirname -exec chmod xxx {} \; -print

where dirname is the directory you want to change permissions.

This tip generously supported by: avsrao_india@hotmail.com

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Minggu, 13 Desember 2009

Unix Tip: REMOVING BLANK LINES

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3233 - December 13, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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REMOVING BLANK LINES

To remove blank lines from a file using sed, use the following:

sed -e '/^$/d' filetoread >filetowrite

The ^ matches the beginning of a line and the $ matches the end. The two of them together matches a line that begins and ends with nothing in between (blank line).
The d just says delete the lines for which we have a match. Since the standard operation of sed is to print every line, all lines exept blank lines will be sent to filetowrite.

This tip generously supported by: code@ionet.net

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Rabu, 09 Desember 2009

Unix Tip: WHAT TIME IS IT REMOTELY?

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3229 - December 9, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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WHAT TIME IS IT REMOTELY?

To get time on a remote UNIX machine within the same domain, you can use the command:

% telnet 13

Trying ...
Connected to
Escape character is '^]'.
Fri Aug 27 19:20:27 1999
Connection closed by foreign host.

You can create a handy alias for the following command to get the remote time:

telnet 13 | grep :

This tip generously supported by: bhavin@informix.com

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Minggu, 06 Desember 2009

Unix Tip: PM THE SYSTEMS

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3226 - December 6, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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PM THE SYSTEMS

It is always a good idea to provide preventative maintenance on systems and workstations:

* Blow out or vacuum dust
* Reset memory
* clean up loose cables
* Label equipment
* Verify configuration
* Document any changes

Holidays are good times when systems are under utilized. If users are around, schedule the downtime. It is just one more way for the user community to see that you care.

hey, maybe you'll even get a Christmas gift from them too.

Merry Christmas.....

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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