Linux Commands Part 9 - 10
Tags: linux-com-book
User accounts are defined in the
/etc/passwd
filegroups are defined in the
/etc/group
file
chown and chgrp
chown
: to change the file ownershipchgrp
: to change the group
d|rwx|rwx|rwx
d : directory
1st block for user
2nd block for group (of user)
3rd block for other
numbering system : read = 4 write = 2 exec = 1
Processes
When a system starts up, the kernel initiates a few of its own activities as processes and launches a program called init
init, in turn, runs a series of shell scripts (located in /etc) called init scripts
The fact that a program can launch other programs is expressed in the process scheme as a parent process producing a child process
Information shown by top
to kill a process :
kill -signal [PID]
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