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Difference between revisions of "File permissions"

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== Add user ==
== Add user ==
<console>
<console>
###i## useradd -g users -G wheel,portage,audio,video,usb,cdrom,tty -m <username>
# useradd -g users -G wheel,portage,audio,video,usb,cdrom,tty -m <username>
</console>
</console>


== Delete user ==
== Delete user ==
<console>
<console>
###i## userder -r <username>
# userder -r <username>
</console>
</console>


== List groups ==
== List groups ==
$##bl## groups
<console>
$##bl## groups <username>
$ groups
$ groups <username>
</console>


== List users ==
== List users ==
$##bl## users
<console>
$ users
</console>


== Add user to group ==
== Add user to group ==
###i## gpasswd -a <user> <group>
<console>
# gpasswd -a <user> <group>
</console>


== Remove user from group ==
== Remove user from group ==
###i## gpasswd -d <user> <group>
<console>
# gpasswd -d <user> <group>
</console>


== Add new group ==
== Add new group ==
###i## groupadd <group>
<console>
# groupadd <group>
</console>


== Delete group ==
== Delete group ==
###i## groupdel <group>
<console>
# groupdel <group>
</console>


== File permissions ==
== File permissions ==
You can change file permissions with chmod.
You can change file permissions with chmod.
<console>
<console>
$##bl## chmod <r><g><u> <file>
$ chmod <r><g><u> <file>
</console>
</console>
<r> = number for root permissions
<r> = number for root permissions
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You can change owner and group of file with chown.
You can change owner and group of file with chown.
<console>
<console>
###i## chown <user>:<group> <file>
# chown <user>:<group> <file>
</console>
</console>
You can change owner of folder and files inside recursively with:
You can change owner of folder and files inside recursively with:
<console>
<console>
###i## chown -R <user>:<group> <folder>
# chown -R <user>:<group> <folder>
</console>
</console>


[[Category:HOWTO]]
[[Category:HOWTO]]
[[Category:First Steps]]
[[Category:First Steps]]

Revision as of 20:56, September 25, 2014

Add user

root # useradd -g users -G wheel,portage,audio,video,usb,cdrom,tty -m <username>

Delete user

root # userder -r <username>

List groups

user $ groups
user $ groups <username>

List users

user $ users

Add user to group

root # gpasswd -a <user> <group>

Remove user from group

root # gpasswd -d <user> <group>

Add new group

root # groupadd <group>

Delete group

root # groupdel <group>

File permissions

You can change file permissions with chmod.

user $ chmod <r><g><u> <file>

<r> = number for root permissions <g> = number for group permissions = number for user permissions

7 = 4+2+1 (read/write/execute)
6 = 4+2 (read/write)
5 = 4+1 (read/execute)
4 = 4 (read)
3 = 2+1 (write/execute)
2 = 2 (write)
1 = 1 (execute)

Change owner and group of file

You can change owner and group of file with chown.

root # chown <user>:<group> <file>

You can change owner of folder and files inside recursively with:

root # chown -R <user>:<group> <folder>