Which option is used to see the entire list of processes running in system?
|
Checks the status of active processes on a system, as well as displays detailed information about the processes Show
dispadmin dispadmin(1M) Lists default scheduling policies priocntl priocntl(1) Assigns processes to a priority class and manages process priorities nice nice(1) Changes the priority of a timesharing process psrset psrset(1M) Binds specific process groups to a group of processors rather than to just a single processor The Solaris Management Console's Processes Tool enables you to manage processes with a user-friendly interface. For information on using and starting the Solaris Management Console, see “Working With the Management Console (Tasks)” in System Administration Guide: Basic Administration. The ps CommandThe ps command enables you to check the status of active processes on a system, as well as display technical information about the processes. This data is useful for such administrative tasks as determining how to set process priorities. Depending on which options you use, the ps command reports the following information:
The following table describes some fields that are reported by the ps command. Which fields are displayed depend on which option you choose. For a description of all available options, see ps(1). Table 23–2 Summary of Fields in ps ReportsField Description UID The effective user ID of the process's owner. PID The process ID. PPID The parent process ID. C The processor utilization for scheduling. This field is not displayed when the -c option is used. CLS The scheduling class to which the process belongs such as real-time, system, or timesharing. This field is included only with the -c option. PRI The kernel thread's scheduling priority. Higher numbers indicate a higher priority. NI The process's nice number, which contributes to its scheduling priority. Making a process “nicer” means lowering its priority. ADDR The address of the proc structure. SZ The virtual address size of the process. WCHAN The address of an event or lock for which the process is sleeping. STIME The starting time of the process in hours, minutes, and seconds. TTY The terminal from which the process, or its parent, was started. A question mark indicates that there is no controlling terminal. TIME The total amount of CPU time used by the process since it began. CMD The command that generated the process. How to List ProcessesYou can use the ps command to list all the processes on a system. ps Displays only the processes that are associated with your login session. -ef Displays full information about all the processes that are being executed on the system. -c Displays process scheduler information. Example—Listing ProcessesThe following example shows output from the ps command when no options are used. $ ps PID TTY TIME COMD 1664 pts/4 0:06 csh 2081 pts/4 0:00 ps The following example shows output from ps -ef. This output shows that the first process that is executed when the system boots is sched (the swapper) followed by the init process, pageout, and so on. $ ps -ef
UID PID PPID C STIME TTY TIME CMD
root 0 0 0 Dec 20 ? 0:17 sched
root 1 0 0 Dec 20 ? 0:00 /etc/init -
root 2 0 0 Dec 20 ? 0:00 pageout
root 3 0 0 Dec 20 ? 4:20 fsflush
root 374 367 0 Dec 20 ? 0:00 /usr/lib/saf/ttymon
root 367 1 0 Dec 20 ? 0:00 /usr/lib/saf/sac -t 300
root 126 1 0 Dec 20 ? 0:00 /usr/sbin/rpcbind
root 54 1 0 Dec 20 ? 0:00 /usr/lib/sysevent/syseventd
root 59 1 0 Dec 20 ? 0:00 /usr/lib/picl/picld
root 178 1 0 Dec 20 ? 0:03 /usr/lib/autofs/automountd
root 129 1 0 Dec 20 ? 0:00 /usr/sbin/keyserv
root 213 1 0 Dec 20 ? 0:00 /usr/lib/lpsched
root 154 1 0 Dec 20 ? 0:00 /usr/sbin/inetd -s
root 139 1 0 Dec 20 ? 0:00 /usr/lib/netsvc/yp/ypbind ...
root 191 1 0 Dec 20 ? 0:00 /usr/sbin/syslogd
root 208 1 0 Dec 20 ? 0:02 /usr/sbin/nscd
root 193 1 0 Dec 20 ? 0:00 /usr/sbin/cron
root 174 1 0 Dec 20 ? 0:00 /usr/lib/nfs/lockd
daemon 175 1 0 Dec 20 ? 0:00 /usr/lib/nfs/statd
root 376 1 0 Dec 20 ? 0:00 /usr/lib/ssh/sshd
root 226 1 0 Dec 20 ? 0:00 /usr/lib/power/powerd
root 315 1 0 Dec 20 ? 0:00 /usr/lib/nfs/mountd
root 237 1 0 Dec 20 ? 0:00 /usr/lib/utmpd
.
.
. The /proc File System and CommandsYou can display detailed information about the processes listed in the /proc directory by using process commands. The /proc directory is also known as the process file system (PROCFS). Images of active processes are stored here by their process ID number. The process tools are similar to some options of the ps command, except that the output that is provided by these commands is more detailed. In general, the process commands do the following:
Managing Processes With /proc Process CommandsYou can display detailed, technical information about or control active processes by using some of the process commands. Table 23–3 lists some of the /proc commands. If a process becomes trapped in an endless loop, or if it takes too long to execute, you might want to stop (kill) the process. For more information about stopping processes using the pkill command, see Chapter 23, Managing System Processes (Tasks). The /proc file system is a directory hierarchy that contains additional subdirectories for state information and control functions. The /proc file system also provides a watchpoint facility that is used to remap read and write permissions on the individual pages of a process's address space. This facility has no restrictions and is MT-safe. Debugging tools have been modified to use /proc's watchpoint facility, which means that the entire watchpoint process is faster. The following restrictions have been removed when setting watchpoints by using the dbx debugging tool:
For more information, see proc(4), core(4), and mdb(1). Table 23–3 /proc Process CommandsProcess Command Description pcred Displays process credential information pfiles Reports fstat and fcntl information for open files in a process pflags Prints /proc tracing flags, pending and held signals, and other status information pldd Lists the dynamic libraries that are linked into a process pmap Prints the address space map of each process psig Lists the signal actions and handlers of each process prun Starts each process pstack Prints a hex+symbolic stack trace for each lwp in each process pstop Stops each process ptime Times a process by using microstate accounting ptree Displays the process trees that contain the process pwait Displays status information after a process terminates pwdx Displays the current working directory for a process For more information, see proc(1). How to Display Information About Processes
Example—Displaying Information About ProcessesThe following example shows how to use process tool commands to display more information about an lpsched process. # pgrep lpsched 1
213
# pwdx 213 2
213: /
# ptree 213 3
213 /usr/lib/lpsched
# pfiles 213 4
213: /usr/lib/lpsched
Current rlimit: 4096 file descriptors
0: S_IFIFO mode:0000 dev:270,0 ino:67 uid:0 gid:0 size:0
O_RDWR
1: S_IFIFO mode:0000 dev:270,0 ino:67 uid:0 gid:0 size:0
O_RDWR
3: S_IFCHR mode:0666 dev:136,0 ino:35882 uid:0 gid:3 rdev:21,0
O_WRONLY FD_CLOEXEC
4: S_IFDOOR mode:0444 dev:275,0 ino:18526 uid:0 gid:0 size:0
O_RDONLY|O_LARGEFILE FD_CLOEXEC door to nscd[208]
5: S_IFREG mode:0664 dev:136,0 ino:64648 uid:71 gid:8 size:0
O_WRONLY
How to Control Processes
Example—Controlling ProcessesThe following example shows how to use process tools to stop and restart dtpad. # pgrep dtpad 1 2921 # pstop 2921 2 # prun 2921 3
Killing a Process (pkill)Sometimes, you might need to stop (kill) a process. The process might be in an endless loop, or you might have started a large job that you want to stop before it is completed. You can kill any process that you own, and superuser can kill any process in the system except for those processes with process IDs of 0, 1, 2, 3, and 4. Killing these processes might crash the system. How to see running processes in Linux?Check running process in Linux. Open the terminal window on Linux.. For remote Linux server use the ssh command for log in purpose.. Type the ps aux to see all running process in Linux.. Alternatively, you can issue the top command or htop command to view running process in Linux.. Which Linux command will list all the processes in the system?To list currently running processes, use the ps , top , htop , and atop Linux commands. You can also combine the ps command with the pgrep command to identify individual processes.
Which command lists all running processes at the command line?Use the tasklist command to see the list of running processes in Windows. To view the list of the processes that are currently running, you can use the tasklist command, both in Command Prompt and PowerShell. Type tasklist and press Enter.
|
