LINUXOPOLIS # 2019-11-11 ~ USERS

USER

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Screenshot by Willi Glenz

SUMMARY

01 USERS ................................................................. 19-07

04 config ................................................................ 19-11 update
07 files ................................................................. 19-11 new

03 create ................................................................ 19-07
05 modify ................................................................ 19-07
06 delete ................................................................ 19-08

02 sources ............................................................... 19-07

#07

07 FILES

/etc/passwd
/etc/shadow
/etc/group
/etc/adduser.conf
/etc/default/useradd

# vipw
# vigr

06 DELETE

# deluser --remove-home user1   // wrapper - Debian tool
# userdel -r user1              // low level utility 

# passwd -l user1               // lock
# passwd -u user1               // unlock

$ man userdel

05 MODIFY

# usermod -c "Another full name" user1
# chown -R user1:user1 /home/userxyz
# vim /etc/sudoers

$ man usermod

04 CONFIG

# vim /etc/adduser.conf
# vim /etc/default/useradd
# vim /etc/passwd 
# vim /etc/shadow 
# vim /etc/group

03 CREATE

VERSION I
 # ls -lisa /etc/skel
 # vim /etc/adduser.conf
 # adduser user1    
 # passwd -S user1      
 $ clear; finger; echo; finger user1; echo
 $ id user1

VERSION II
 # ls -lisa /etc/skel
 # useradd -D
 # vim /etc/default/useradd
 # useradd user1                                                    // Default
 # useradd user1 -c "User's full name" -d /home/test -u 1099        // Modified
 # passwd user1
 # passwd -S user1
 $ clear; finger; echo; finger user1; echo
 $ id user1

$ man useradd
$ man adduser       // Wrapper

02 SOURCES

DebianAdmin     : debianadmin.com/users-and-groups-administration-in-linux.html
Manpages        $ man useradd usermod userdel adduser deluser

01 USERS

# passwd -S user1
$ clear; finger; echo; finger user1; echo
$ cut -d: -f1 < /etc/passwd | sort | xargs
# find /home -uid 1000 | wc -l
# find /home -uid 1000 | tee 1000-files.txt
# find / -uid 1000 -exec chown -v 1002:1002 {} \;
$ id -u root
$ id -u user1
$ id user1
$ fuser -v /media/xyz
$ getent passwd user1