Pgrep, Pkill, Kill and Jobs Config Files: Package: Services

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Pgrep, pkill, kill and jobs

Config files: Package: Services: Commands: URL:

1. As the root user, create a job running in the background of your current terminal. Execute the script for that program process to be created.

[root@localhost]# (while true; do echo "My program" > ~/output.file; done) &

2.View the current jobs running in the background of your terminal.

[root@localhost ~]# jobs [1]- Running ( while true; do< echo -n "My program" >> ~/output.file; done ) &

3. Stop the process from running, without killing the process, using the kill command.

[root@localhost]# kill -SIGSTOP %1 (%1 is the job number, if the job was 2 it would be %2)

4. View the stopped jobs in the background.

[root@localhost ~]# jobs [1]+ Stopped ( while true; do echo -n "My program" >> ~/output.file; done ) &

5. Start the process again using the kill command.

[root@localhost]# kill -SIGCONT %1

6. Kill the process without allowing any blocking of the kill command.

[root@localhost]# kill -SIGKILL %1

1. Download and install the httpd service.

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[root@localhost]# yum install httpd

2. Start the httpd service (or ensure that it is running).

[root@localhost]# systemctl start httpd

3. As the root user, grep for all processes that are running as the root user and display the process names.

[root@localhost]# pgrep -u root -l

4. As the user user, start the vi program at the terminal.

[user@localhost]# vi

5. As the root user, in your second terminal window, grep for all processes running under the user "user" and include the process names.

[root@localhost ~]# pgrep -u user -l 3690 dconf-service 3694 vim ...etc additional output cut off.

6. As the root user, grep for the "httpd" process.

[root@localhost]# pgrep httpd

7. As the root user, kill all of the "user" user's processes and boot that user from the system.

[root@localhost ~]# w 14:15:59 up 20:55, 4 users, load average: 0.00, 0.01, 0.05 USER TTY LOGIN@ IDLE JCPU PCPU WHAT user pts/0 Mon22 2:58m 0.05s 0.05s bash [root@localhost ]# pkill -t pts/0 This kills every process started from the user's terminal, but it does not boot the user. Now find all running processes left, which should either be Bash or SSH.

[root@localhost]# pgrep -u user [root@localhost]# pkill -u user ssh