How to Get Detailed Information About a Linux PID, Process ID

To get detailed information about a Linux PID you can use the strace command. If strace is not installed it can be installed via yum using the command below.

Strace Install:

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1	yum install strace

Below is a sample output from using the strace command on a Litespeed web server process.

Sample Output:

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[root@idev log]# strace -p 14387 Realtime Example: #ps -eo pcpu,pid,user,args | sort -k 1 -r | head -10 %CPU PID USER COMMAND 12.5 22288 root cp -Rvp /oracle/data/ /mnt/backup 0.4 31293 nagios /opt/nagios/bin/nagios -d /opt/nagios/etc/nagios.cfg 0.3 16481 root top 0.2 4024 root hpasmd 0.1 4645 root cmanicd 0.1 23378 tinydns /usr/local/bin/dnscache 0.0 9 root [kacpid] 0.0 9880 apache /opt/apache/bin/httpd 0.0 8 root [khelper] # strace -cp 22288 Process 22288 attached - interrupt to quit Process 22288 detached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 56.29 0.459280 20 23088 write 43.71 0.356596 15 23089 read ------ ----------- ----------- --------- --------- ---------------- 100.00 0.815876 46177 total