Red hat work station default run level is 5
By through init command we can switch run level form one level to another level.
#init 3
The above command switch the system from current run level to run level 3
1:345:respawn:/sbin/mingetty tty2 in /sbin/init
The above line directs /sbin/init to run the mingetty program on tty2 in run levels 3 through 5