Shell Programming and Scripting

Hi all,

As i am new to shell script.Please help me to write a Shell script to find out process name that are running for last 10 days.

Thank's in advance.

Hi Manas,

It is generally not possible to identify which processes have run in the past, I say generally because some processes will write log files etc. So if this information is known, you may be able to retrospectively identify processes that have ran in the past.

I would suggest that you start with the ps utility, information can be found in the man pages.

You don't mention OS, platform or any other information which may allow us to assist you.

Regards

Gull04

OS is Red hat Enterprises linux 5.

Hi Manas,

Some guidance on the way that processes work which may possibly help you.

To check the current process list, you can use a command like ps (process status) an example would be ps -ef showing the active list of processes.

The information presented provides much information about the process, even the ps command will show in this list. It will only exist "while the command is running", it will have a unique PID (Process ID) each time it is run. Once the process has completed there is no evidence that it has ever been there, to capture the data that you have requested - you would have had to start 10 days ago.

Regards

Dave Munro

It is not quite clear what you really want. Should it be "processes running that started more than ten days ago", ps with a keyword or format specifier could help:

Can i write the script like the following code to get the process name.
please suggest any other way if you can.

Code:

#!/bin/sh

for var in `ps -ef` 

# getting the TIME field of the ps -ef command

running_day =`echo $var | awk -F " " ' { print $7} ' | cut -d ':' -f1`

# comparing the running_day with given time
if [ running_day -ge 10]
then
# taking the process name

process_name=`echo $var | awk -F " " ' { print $8} ' | cut -d ':' -f1`
fi
echo $process_name

Moderator's Comments:

Please use code tags as required by forum rules!

Are you aware that in plain (linux!) ps -ef field 7 is the TIME field, i.e. accumulated cpu time, which has no relation to the process' start time at all?

WHAT EXACTLY are you after?

Your script is missung the for loop's do and done, and why don't you extract "running_day" and "process_name" in one go?