[sanishr]

strFree="stmnt"
strImportantType="coldimpnt"



intUID=$(ps -fu lower | awk "/${strFree}/ && /${strImportantType}/ && ! /awk/ "'{ print $2 }')

where lower is the user.

[ashitpro]

'strFree' and 'strImportantType' are variables with values 'stmnt' and 'coldimpnt' resp.
Then...
When you say...${strFree}, it means value of that variable..
So..."/${strFree}/some_other_directory" will get expand to.
"/stmnt/some_other_directory"

[sanishr]

then why && is there in between the directory path.Is it checking the true/falsity of the stmt. /${strFREE}.

if yes then what for is it checking,as bcoz we have already set the value of the variable.

And what does " ! /awk/ " denonetes in the prog.

[ashitpro]

Originally Posted by sanishr

then why && is there in between the directory path.Is it checking the true/falsity of the stmt. /${strFREE}.

if yes then what for is it checking,as bcoz we have already set the value of the variable.

And what does " ! /awk/ " denonetes in the prog.

I apologize for previous reply...
This script is used to print the PID of the processes which are own by the specific user...

ps -fu lower

this command will give you the list of processes owned by user 'lower'

Now lets see the awk..

cat file_name | awk "/abc/ && /pqr/"

this command is used to search for 'abc' as well as 'pqr' in same line..
So if any line in file 'file_name' contains 'abc' and 'pqr', will get displayed.

Coming back to your script...

ps -fu lower | awk "/abc/ && /pqr/ ! /awk/"

It will search for line which contains 'abc' and 'pqr' and does not contain 'awk'

ps -fu lower | awk "/abc/ && /pqr/ ! /awk/"'{print $2}'

and for last statement 'print $2' it will print the second field i.e. PID(in my case).

[sanishr]

what is the need of giving '/' in (ps -fu lower | awk "/abc/ && /pqr/ ! /awk/")
can't we write like this for the same functionality (ps -fu lower | awk "abc && pqr ! awk")

[ashitpro]

Originally Posted by sanishr

what is the need of giving '/' in (ps -fu lower | awk "/abc/ && /pqr/ ! /awk/")
can't we write like this for the same functionality (ps -fu lower | awk "abc && pqr ! awk")

/regex/ This syntax is used for specifying regular expressions...
In above example everything will work fine even if you omit the slashes..