Programming Forums > Script Programming > Sed and Awk

mattireland · Jul 12th, 2007, 2:00 PM

What are these? They sound pretty cool and I'd like to get to grips with them

Can someone give me a link or explain to me how to get started please? I already use Linux.

Thanks very much!

ReggaetonKing · Jul 12th, 2007, 3:05 PM

There are built into most Linux distros. Just type the command with the arguments and you're on your way!

mattireland · Jul 12th, 2007, 3:55 PM

Thanks for the reply!!!

I've typed in both sed and awk separately and all I get is a list of words and a bit of text about reporting bugs. Is it possible to actually use this?

Thanks!

ReggaetonKing · Jul 12th, 2007, 4:08 PM

Well, since sed and awk are both CLI scripting languages, you must specifiy what exactly you want to do with them.

Example

(Toggle Plain Text)

grep b* filename

This would list all of the files in the working directory that start with the letter b.

DaWei · Jul 12th, 2007, 5:19 PM

I'm thinking that a trip to the man pages, or to Google, would answer more questions in one trip than you might expect to achieve in a 40-post forum thread. Just a thought, of course. Inefficient farbling around might be more enjoyable, if you're into that sort of thing.

Infinite Recursion · Jul 13th, 2007, 8:32 AM

sed, awk, vi ... if you want to write scripts in unix/linux learn them.

See these lists for examples:
http://www.student.northpark.edu/pem...d/sed1line.txt
http://www.student.northpark.edu/pem...k/awk1line.txt

mattireland · Jul 13th, 2007, 9:04 AM

IR: Thanks for the advice! I'll give them a go as I think I'm going to get into Linux now.

DaWei: Of course! Inefficient farbling is 100% cool!

What are the man pages? Of course I could google the answer but when I could farble inneficiently what's the point?

Infinite Recursion · Jul 13th, 2007, 1:46 PM

man = manual

run this at the linux prompt

man sed
man awk
man vi

pressing the space bar or down arrow should let you scroll the content

mattireland · Jul 13th, 2007, 4:29 PM

Thanks for this. I'm giving it a go now.

My version of Slackware just got seriously noobed up. I deleted my Kubuntu partition because I had loads of unnecesary stuff and decided to reinstall Kubuntu so made the necessary partitions and gave Kubuntu 8GB. The installation failed and now the LILO boot loader doesn't work. Good job I made a boot floppy. Any suggestions on how I can get the boot loader working again. Anything would be great! Thanks!

Jul 12th, 2007, 2:00 PM	#1
mattireland Hobbyist Programmer Join Date: Jul 2007 Location: Wales, United Kingdom Posts: 190 Rep Power: 2	Sed & Awk What are these? They sound pretty cool and I'd like to get to grips with them Can someone give me a link or explain to me how to get started please? I already use Linux. Thanks very much! __________________ Matt Ireland http://www.mattireland.org matt@mattireland.co.uk

Jul 12th, 2007, 3:05 PM	#2
ReggaetonKing Sexy Programmer Join Date: Nov 2005 Location: New Jersey Posts: 891 Rep Power: 3	There are built into most Linux distros. Just type the command with the arguments and you're on your way! __________________ I would love to change the world, but they won't give me the source code!

Jul 12th, 2007, 3:55 PM	#3
mattireland Hobbyist Programmer Join Date: Jul 2007 Location: Wales, United Kingdom Posts: 190 Rep Power: 2	Thanks for the reply!!! I've typed in both sed and awk separately and all I get is a list of words and a bit of text about reporting bugs. Is it possible to actually use this? Thanks! __________________ Matt Ireland http://www.mattireland.org matt@mattireland.co.uk

Jul 12th, 2007, 4:08 PM	#4
ReggaetonKing Sexy Programmer Join Date: Nov 2005 Location: New Jersey Posts: 891 Rep Power: 3	Well, since sed and awk are both CLI scripting languages, you must specifiy what exactly you want to do with them. Example (Toggle Plain Text) grep b* filename grep b* filename This would list all of the files in the working directory that start with the letter b. __________________ I would love to change the world, but they won't give me the source code!

Jul 12th, 2007, 5:19 PM	#5
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	I'm thinking that a trip to the man pages, or to Google, would answer more questions in one trip than you might expect to achieve in a 40-post forum thread. Just a thought, of course. Inefficient farbling around might be more enjoyable, if you're into that sort of thing. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jul 13th, 2007, 8:32 AM	#6
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,464 Rep Power: 8	sed, awk, vi ... if you want to write scripts in unix/linux learn them. See these lists for examples: http://www.student.northpark.edu/pem...d/sed1line.txt http://www.student.northpark.edu/pem...k/awk1line.txt __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Jul 13th, 2007, 9:04 AM	#7
mattireland Hobbyist Programmer Join Date: Jul 2007 Location: Wales, United Kingdom Posts: 190 Rep Power: 2	IR: Thanks for the advice! I'll give them a go as I think I'm going to get into Linux now. DaWei: Of course! Inefficient farbling is 100% cool! What are the man pages? Of course I could google the answer but when I could farble inneficiently what's the point? __________________ Matt Ireland http://www.mattireland.org matt@mattireland.co.uk

Jul 13th, 2007, 1:46 PM	#8
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,464 Rep Power: 8	man = manual run this at the linux prompt man sed man awk man vi pressing the space bar or down arrow should let you scroll the content __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Jul 13th, 2007, 4:29 PM	#9
mattireland Hobbyist Programmer Join Date: Jul 2007 Location: Wales, United Kingdom Posts: 190 Rep Power: 2	Thanks for this. I'm giving it a go now. My version of Slackware just got seriously noobed up. I deleted my Kubuntu partition because I had loads of unnecesary stuff and decided to reinstall Kubuntu so made the necessary partitions and gave Kubuntu 8GB. The installation failed and now the LILO boot loader doesn't work. Good job I made a boot floppy. Any suggestions on how I can get the boot loader working again. Anything would be great! Thanks! __________________ Matt Ireland http://www.mattireland.org matt@mattireland.co.uk

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Programming Forums > Script Programming > Sed and Awk

Sed & Awk