Install Psmisc by running the following commands: ./configure --prefix=/usr --exec-prefix=/ && make && make install Psmisc's pidof program isn't installed by default. Generally, this isn't a problem because we later install the Sysvinit package, which provides a better pidof program. It's up to you to decide if you are going to use the Sysvinit package, which provides a pidof program, or not. If you're not going to use Sysvinit, you should complete this package's installation by creating the /bin/pidof symlink by running: ln -s killall /bin/pidof