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Reading entire ebook would be boring initially. Better to pick a topic and learn it and then pick another topic.

Man pages and Unix.com are good resources to learn that.

Better to use -exec operator.

First use this for verification:
find . -type f -mtime +90 -name 'tomcatfiles*.log' -exec ls {} \;

And then this for deletion:
find . -type f -mtime +90 -name...

You can do it directly with
grep -i <ip address> /etc/hosts

Not sure why you need to use awk. Please provide more details if you have any specific requirement.

mv $file /data/home/abc/xyz/azher/backup/`echo $file|cut -d. -f1`_$now.csv

I thought order of line is not important, as requester also tried it. By seeing the reply, it seems sort worked fine for him.

I tried copying the lines mentioned here in a text file and used sort. It worked.

You can use uniq to remove duplicate lines.

To avoid permission error messages, use this:

find . -type d -name "sr*" -print 2>/dev/null

You can do this:


cat A|sort > tmpA
cat B|sort > tmpB
diff tmpA tmpB|grep "<"


You can redirect the last line to an output file too, if required.

gunzip filename.txt.Z

or


gzip -d filename.txt.Z


Both command will return you file filename.txt which is readable.

You can use following code to check size of all directories and sub-directories :


find . -type d | xargs du -sk

It can also be accomplished easily with :

perl -p -i -e 's/&/&amp/g' infile

For HP UX, you can check here:

Technical documentation (http://docs.hp.com)

Just select your version and you will get everything including user commands, admin commands, library functions etc.

Gaurav,
Thanks friend, your solution is working fine.

"tac" is not available on HP UX

"rev" reverse the order of characters line-wise

I have a big database log file which keepsgrowing daily. OS is HP UX. Here is a small part of it:

Tue Jan 27 04:03:22 2009
[2009/01/27@04:03:22.906-0500] : add session begin for...