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What is the use of option -o in the useradd command?
useradd fails on archlinuxDisable login for useraddWhat does adduser do that useradd doesn't?useradd PAM authentication failedWhat variables are valid within /etc/default/useradd file?Can't add users anymore by using useradduseradd where account name is a numberDebian 9 - useraddadduser has no difference from useraddwhat is difference between useradd -m and useradd -d?
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What is the use of option -o for command useradd? What is a good use case of this option?
linux useradd
edited 2 days ago
Rui F Ribeiro
42.6k1486146
asked Apr 9 at 17:23
osmakosmak
584
add a comment |
What is the use of option -o for command useradd? What is a good use case of this option?
linux useradd
edited 2 days ago
Rui F Ribeiro
42.6k1486146
asked Apr 9 at 17:23
osmakosmak
584
add a comment |
What is the use of option -o for command useradd? What is a good use case of this option?
linux useradd
edited 2 days ago
Rui F Ribeiro
42.6k1486146
asked Apr 9 at 17:23
osmakosmak
584
What is the use of option -o for command useradd? What is a good use case of this option?
linux useradd
linux useradd
edited 2 days ago
Rui F Ribeiro
42.6k1486146
asked Apr 9 at 17:23
osmakosmak
584
edited 2 days ago
Rui F Ribeiro
42.6k1486146
asked Apr 9 at 17:23
osmakosmak
584
edited 2 days ago
Rui F Ribeiro
42.6k1486146
edited 2 days ago
Rui F Ribeiro
42.6k1486146
edited 2 days ago
Rui F Ribeiro
42.6k1486146
42.6k1486146
asked Apr 9 at 17:23
osmakosmak
584
asked Apr 9 at 17:23
osmakosmak
584
asked Apr 9 at 17:23
osmakosmak
584
584
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
useradd’s -o option, along with its -u option, allows you to create a user with a non-unique user id. One use case for that is to create users with identical privileges (since they share the same user id) but different passwords, and if appropriate, home directories and shells. This can be useful for service accounts (although typically you’d achieve the same result using sudo nowadays); it can also be useful for rescue purposes with a root-equivalent account using a statically-linked shell such as sash.
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
add a comment |
The -o option allows the creation of users with non-unique IDs, only when you also supply the numerical value of their UID with the -u option in the same line, e.g.:
# useradd -o huey -u 501
# useradd -o dewey -u 501
# useradd -o louie -u 501
This permits setting up multiple users with same rights and priveleges, but with different home directories and passwords.
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
# useradd -o scrooge -u 0
– rrauenza
Apr 9 at 21:44
1
Wonderful way to break all applications that parse usernames as output ofidorls -l. Givensu - scrooge -c 'id -u -n'says 'root' :)
– kubanczyk
Apr 10 at 7:30
And, quite unexpectedly, it also totalled my gdm on Ubuntu 18.04. Awww crap, I should have done it inside container...
– kubanczyk
Apr 11 at 14:30
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
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active
oldest
votes
useradd’s -o option, along with its -u option, allows you to create a user with a non-unique user id. One use case for that is to create users with identical privileges (since they share the same user id) but different passwords, and if appropriate, home directories and shells. This can be useful for service accounts (although typically you’d achieve the same result using sudo nowadays); it can also be useful for rescue purposes with a root-equivalent account using a statically-linked shell such as sash.
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
add a comment |
useradd’s -o option, along with its -u option, allows you to create a user with a non-unique user id. One use case for that is to create users with identical privileges (since they share the same user id) but different passwords, and if appropriate, home directories and shells. This can be useful for service accounts (although typically you’d achieve the same result using sudo nowadays); it can also be useful for rescue purposes with a root-equivalent account using a statically-linked shell such as sash.
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
add a comment |
useradd’s -o option, along with its -u option, allows you to create a user with a non-unique user id. One use case for that is to create users with identical privileges (since they share the same user id) but different passwords, and if appropriate, home directories and shells. This can be useful for service accounts (although typically you’d achieve the same result using sudo nowadays); it can also be useful for rescue purposes with a root-equivalent account using a statically-linked shell such as sash.
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
useradd’s -o option, along with its -u option, allows you to create a user with a non-unique user id. One use case for that is to create users with identical privileges (since they share the same user id) but different passwords, and if appropriate, home directories and shells. This can be useful for service accounts (although typically you’d achieve the same result using sudo nowadays); it can also be useful for rescue purposes with a root-equivalent account using a statically-linked shell such as sash.
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
edited Apr 10 at 8:00
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
answered Apr 9 at 17:28
Stephen KittStephen Kitt
184k26422501
184k26422501
add a comment |
add a comment |
The -o option allows the creation of users with non-unique IDs, only when you also supply the numerical value of their UID with the -u option in the same line, e.g.:
# useradd -o huey -u 501
# useradd -o dewey -u 501
# useradd -o louie -u 501
This permits setting up multiple users with same rights and priveleges, but with different home directories and passwords.
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
# useradd -o scrooge -u 0
– rrauenza
Apr 9 at 21:44
1
Wonderful way to break all applications that parse usernames as output ofidorls -l. Givensu - scrooge -c 'id -u -n'says 'root' :)
– kubanczyk
Apr 10 at 7:30
And, quite unexpectedly, it also totalled my gdm on Ubuntu 18.04. Awww crap, I should have done it inside container...
– kubanczyk
Apr 11 at 14:30
add a comment |
The -o option allows the creation of users with non-unique IDs, only when you also supply the numerical value of their UID with the -u option in the same line, e.g.:
# useradd -o huey -u 501
# useradd -o dewey -u 501
# useradd -o louie -u 501
This permits setting up multiple users with same rights and priveleges, but with different home directories and passwords.
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
# useradd -o scrooge -u 0
– rrauenza
Apr 9 at 21:44
1
Wonderful way to break all applications that parse usernames as output ofidorls -l. Givensu - scrooge -c 'id -u -n'says 'root' :)
– kubanczyk
Apr 10 at 7:30
And, quite unexpectedly, it also totalled my gdm on Ubuntu 18.04. Awww crap, I should have done it inside container...
– kubanczyk
Apr 11 at 14:30
add a comment |
The -o option allows the creation of users with non-unique IDs, only when you also supply the numerical value of their UID with the -u option in the same line, e.g.:
# useradd -o huey -u 501
# useradd -o dewey -u 501
# useradd -o louie -u 501
This permits setting up multiple users with same rights and priveleges, but with different home directories and passwords.
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
The -o option allows the creation of users with non-unique IDs, only when you also supply the numerical value of their UID with the -u option in the same line, e.g.:
# useradd -o huey -u 501
# useradd -o dewey -u 501
# useradd -o louie -u 501
This permits setting up multiple users with same rights and priveleges, but with different home directories and passwords.
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
answered Apr 9 at 17:35
K7AAYK7AAY
1,2031028
1,2031028
# useradd -o scrooge -u 0
– rrauenza
Apr 9 at 21:44
1
Wonderful way to break all applications that parse usernames as output ofidorls -l. Givensu - scrooge -c 'id -u -n'says 'root' :)
– kubanczyk
Apr 10 at 7:30
And, quite unexpectedly, it also totalled my gdm on Ubuntu 18.04. Awww crap, I should have done it inside container...
– kubanczyk
Apr 11 at 14:30
add a comment |
# useradd -o scrooge -u 0
– rrauenza
Apr 9 at 21:44
1
Wonderful way to break all applications that parse usernames as output ofidorls -l. Givensu - scrooge -c 'id -u -n'says 'root' :)
– kubanczyk
Apr 10 at 7:30
And, quite unexpectedly, it also totalled my gdm on Ubuntu 18.04. Awww crap, I should have done it inside container...
– kubanczyk
Apr 11 at 14:30
# useradd -o scrooge -u 0
– rrauenza
Apr 9 at 21:44
# useradd -o scrooge -u 0
– rrauenza
Apr 9 at 21:44
1
1
Wonderful way to break all applications that parse usernames as output of
id or ls -l. Given su - scrooge -c 'id -u -n' says 'root' :)– kubanczyk
Apr 10 at 7:30
Wonderful way to break all applications that parse usernames as output of
id or ls -l. Given su - scrooge -c 'id -u -n' says 'root' :)– kubanczyk
Apr 10 at 7:30
And, quite unexpectedly, it also totalled my gdm on Ubuntu 18.04. Awww crap, I should have done it inside container...
– kubanczyk
Apr 11 at 14:30
And, quite unexpectedly, it also totalled my gdm on Ubuntu 18.04. Awww crap, I should have done it inside container...
– kubanczyk
Apr 11 at 14:30
add a comment |
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