Today, when using the ps command, the process ID of the specified name cannot be found. Careful search only shows that the command and parameter information of the process startup in the result of the ps command search is truncated
Problem instance
User wanng starts a process wanng_qytrunkcross, the startup parameter is the config.lua file, execute ps -u wanng to query the user's process, the results are as follows:
[wanng@localhost shell]# ps -u wanng
PID TTY TIME CMD
127271 ? 00:00:01 sshd
127272 pts/4 00:00:00 bash
127332 pts/4 00:17:19 wanng_qytrunkcros
It is found from the results that the display of the process name and startup parameters is truncated
solution
The following is the solution found through man ps. The following three methods can solve this problem
w Wide output. Use this option twice for unlimited width
-w Wide output. Use this option twice for unlimited width.
-f Do full-format listing. This option can be combined with many other UNIX-style options to add additional columns. It also causes the command arguments to be printed. When used with -L, the NLWP (number of threads) and LWP (thread ID) columns will be added. See the c option, the format keyword args, and the format keyword comm.
-F Extra full format. See the -f option, which -F implies.
- Add -ww option after ps, the command execution result is as follows
[wanng@localhost shell]# ps -u wanng -w w
PID TTY STAT TIME COMMAND
127271 ? S 0:01 sshd: wanng@pts/4
127272 pts/4 Ss+ 0:00 -bash
127332 pts/4 Sl 17:20 ./wanng_qytrunkcross config.lua
- Add ww option after ps, the command execution result is as follows
[wanng@localhost shell]# ps -u wanng ww
PID TTY STAT TIME COMMAND
127271 ? S 0:01 sshd: wanng@pts/4
127272 pts/4 Ss+ 0:00 -bash
127332 pts/4 Sl 17:20 ./wanng_qytrunkcross config.lua
- Add -f or -F option after ps, which means display in full format, the command execution result is as follows
[wanng@localhost shell]# ps -f -u wanng
UID PID PPID C STIME TTY TIME CMD
wanng 127271 127269 0 13:55 ? 00:00:01 sshd: wanng@pts/4
wanng 127272 127271 0 13:55 pts/4 00:00:00 -bash
wanng 127332 1 3 13:55 pts/4 00:18:30 ./wanng_qytrunkcross config.lua