Can you help me to find the PID's user name, Some time my server got high load. When i top -c, I cannot even find the PID's user name who / which is causing load on the server.
16 Answers
I'm surprised nobody has put this up yet:
Try the -p option to the ps command.
For instance, if you have PID 1234, run:
ps -u -p 1234(The -u was added to include the username in the output)
You can the use grep or awk, etc. to extract the info you want.
/proc/processID/status will have the information about user's ID which you can use to find the username.
This does the same:
uid=$(awk '/^Uid:/{print $2}' /proc/YOUR_PROCESS_ID/status)
getent passwd "$uid" | awk -F: '{print $1}'Replace YOUR_PROCESS_ID with your process ID number.
1Get only username from a PID:
PID=136323
USERNAME="$( ps -o uname= -p "${PID}" )"You can also combine it with a pgrep. In this example we show all usernames executing some .php file:
pgrep -f '\.php' | xargs -r ps -o uname= -p | sort -uFind only one username running a certain unique process:
USERNAME="$( pgrep -nf 'script\.php' | xargs -r ps -o uname= -p )I think the shortest way is:
id -nu </proc/<pid>/loginuidThe /proc/<pid>/loginuid file has the uid number of the user running the process; id -nu reads uid from stdin and returns a user name.
What do you want exactly? On my system, if I run 'top -c' I get:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2873 matt 20 0 3022m 1.6g 1.6g S 22 21.6 2245:42 /usr/lib/virtualbox/VirtualBox --comment ESX5-1 --startvm 4fd78ee9-739a-4d53-a0ce-4f9819ab9411 --no-startvm-errormsgbox 29764matt 20 0 2779m 1.4g 1.3g S 5 18.4 210:33.51 /usr/lib/virtualbox/VirtualBox --comment win2008-2 --startvm 202ec2b7-ae12-40e9-af76-2be429e553d7 --no-startvm-errormsgbox 17281root 20 0 0 0 0 S 2 0.0 0:05.90 [kworker/u:2] So the PID (processus/task identifier) is the first column, and the user account the processus runs under is the second column
You can use the following command.
use ps aux| grep "pid"Also,
ls -ld /proc/"pid"/exe
