Comments on: sed – the missing manual

By: Jean

Jean — Wed, 07 Jul 2010 15:18:54 +0000

@Alexander Sandler - One more fix - since your fix, it prints 22 twice - because of the /g. Thanks for this useful tutorial.

Reply - @Alexander Sandler<\/a> - One more fix - since your fix, it prints 22 twice - because of the \/g.\r\n\r\nThanks for this useful tutorial.'); return false;">Quote

By: Alexander Sandler

Alexander Sandler — Fri, 22 May 2009 17:17:56 +0000

@Priyank You are right. This will print 21 to 29. My apologies. I'll fix it.

Reply - @Priyank<\/a>\r\nYou are right. This will print 21 to 29. My apologies. I\'ll fix it.'); return false;">Quote

By: Priyank

Priyank — Thu, 21 May 2009 12:26:03 +0000

Not sure how this will print 20 to 29 cat file | sed '/.0/ d; 1,10 d; s/1/2/' as mentioned at the end of the article ("that does however exactly the same - prints numbers 20 through 29"). I am getting results 21 to 29. I guess the first sed command will delete 10,20.

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By: Alexander Sandler

Alexander Sandler — Sat, 07 Mar 2009 17:13:29 +0000

@Kashif Of course you can do that. Just make sure to use proper escape sequence(\/) for '/' character. Like this:

$ echo 'http://localhost:port/' | sed 's/http:\/\/localhost:port\//aaa/'
aaa
$

Reply - @Kashif<\/a>\r\nOf course you can do that. Just make sure to use proper escape sequence(\\/) for \'\/\' character. Like this:\r\n

$ echo \'http:\/\/localhost:port\/\' | sed \'s\/http:\\/\\/localhost:port\\/\/aaa\/\'\r\naaa\r\n$ <\/pre>'); return false;">Quote

By: Kashif

Kashif — Fri, 06 Mar 2009 06:05:24 +0000

hi,

can you please let me know how can i modify a regular expression that already contains “/”. like i want to change

http://localhost:port/DevDB with http://productionhost:port/ProdDB

Thanks in advance.
Kashif

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By: Alexander Sandler

Alexander Sandler — Thu, 11 Dec 2008 07:11:58 +0000

This is exactly the same as with everything else in the world. Prettier always preferred over functional. Yet when you strip off all buzzes and whistles, you need tools to do the real job. And you’re right. For the last 30-40 years these have always been same tools Thanks a lot for a warm comment and please visit my web-site again!

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By: Chetan

Chetan — Sat, 06 Dec 2008 14:27:56 +0000

Thanks Alexander, I remember while at Georgetown University in 1975 in a Statistics Class during a semister final where a students' calculator battery died, and the poor kid literally melted down before all of us that day. He failed the final because he had relied too much on the calculator and lost his confidence in doing it by hand (and using his own mind.) This is what has happened to Awk and Sed and Assembler and C as well. Most graduating "Computer Scientists" don't have a clue what actually happens inside a computer. The high level languages are the calculators of yesterday, rendering our minds conditioned to a fantasy, leaving us dumb and frightened of doing it correctly or in the simple, easy way. The command line is looked upon as useless and the old way. I remember when the GUI began to be popular in the 70's early 80's. I immediately felt stripped of power and ability having no choice but to click here and there. Alexander, keep up the great work. You are a blessing in the computer world of ignorance. Why use a gun when a fly swatter is more than enough? Grab a hold of your computers power with the command line! Chetan

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By: peter

peter — Sat, 08 Nov 2008 11:05:11 +0000

The Unix ed command can also be used to delete specificied lines in files.

http://codesnippets.joyent.com/posts/show/1608

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By: Alexander Sandler

Alexander Sandler — Mon, 03 Nov 2008 07:09:17 +0000

@erman Oh yes. Of course I know.

Reply - @erman<\/a>\r\nOh yes. Of course I know.'); return false;">Quote

By: erman

erman — Mon, 03 Nov 2008 02:54:48 +0000

Hi, Do you know how to do this by using sed. "http://www.yahoo.com" change this to "http://www.google.com" thanks, erman

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