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Linux For Beginners & Advanced Users

Tutorials, howtos, faqs, hacks, and tips about GNU/Linux operating systems for Linux users sorted by easy, intermediate and advanced level. ( rss feed ).

I'm trying to match words using GNU awk command and getting the following error:

echo 'foo bar this that blah' | awk '{gsub("\<regex-word\>", "NEW-WORD");print}'

But getting the following warning on screen and it is not working:
awk: warning: escape sequence `\< ' treated as plain `<' awk: warning: escape sequence `\>' treated as plain `>'

How do I fix this problem under Unix like operating systems?
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Linux / Unix rsync: Delete Source File After Transfer

I would like to move all desktop:~/Downloads/*.avi files from my desktop to laptop:~/Download/ using rsync. How do I delete source file after successful transfer is done using rsync command under BSD/Unix/Linux/Apple OS X operating systems?
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HowTo: Install firefox-15.0.tar.bz2 in Linux

Idownloaded Firefox version 15.0 from mozilla ftp server. The name of file is firefox-15.0.tar.bz2. How do I install Firefox under any Debian / Ubuntu / Fedora or any Linux distribution?
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I'd like to remove /dev/sdc5 temporarily without deleting partitions on hard drive /dev/sdc under Linux operating systems?
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How do I list or display all processes, executables, and shared libraries that are using up all virtual memory under Debian or Ubuntu Linux server for troubleshooting purpose?
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I often type the wrong command as follows under Linux bash shell:
rsync -av dir1 user@server1.cyberciti.biz:/path/to/dir1
OR
cp -av file1*.txt file2*.txt /path/to/dest

I need to correct those command as follows:

rsync -av dir5 user@server1.cyberciti.biz:/path/to/dir1
cp -av delta1*.txt delta2*.txt /path/to/dest

How do I replace dir1 with dir5 or file with delta and repeat the last command under bash shell?
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I got over 100s of HTML files in the following format:

 
<html>
<head>
 <title>Statistics for ABC LTD - January 2007 - Rang IDXYZZAZZZZ</title>
</head>
 
<body BGCOLOR="#E8E8E8" TEXT="#000000" LINK="#0000FF" VLINK="#FF0000">
<h2>Statistics for ABC LTF</h2>
<small><strong>
Summary Period: January 2007<br />
Generated 01-Feb-2007 06:40 CET<br />
</strong></small>
<center>
<hr />
<p>
<font SIZE="-1"></font></p></center><pre>
 
my data 1
my data 2
my data 3
my data 10000
my data N times
 

Generated by MyAppDbStatsWriter (UNIX) version 1.9b2


How do I extract text between two words (<PRE> and </PRE>) in unix or linux using grep command?
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