Linux (ubuntu) Permission confusion

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1
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Please, take a look at the following CMD

[thunder@ip-xxx-xx-xx-xx /]$ id
uid=504(thunder) gid=504(thunder) groups=504(thunder)

[thunder@ip-xxx-xx-xx-xx /]$ grep developers /etc/group
developers:x:505:501,502,503,504

[thunder@ip-xxx-xx-xx-xx /]$ groups
thunder

My question is why doesn't developers show up in my groups command

Below you can see

[thunder@ip-xxx-xx-xx-xx opt]$ ls -l
total 12
drwxr-xr-x 5 root root 4096 Mar 7 06:46 aws
-rwxr-xr-x 1 root root 63 Mar 23 22:37 permissions.sh
drwxrwxr-x 7 root developers 4096 Mar 26 19:30 web

The "web" folder has developers as its group,
but still I cannot perform this inside the "web" folder

[thunder@ip-xxx-xx-xx-xx opt]$ cd web
[thunder@ip-xxx-xx-xx-xx web]$ touch a
touch: cannot touch Ã¢Â€Â˜aÃ¢Â€Â™: Permission denied

Note: I tried logging out and logging back in using the logout and exit command, but still no success.

asked Mar 28 at 21:25

ThunderRoid

1063

add a commentÂ |Â

up vote
1
down vote

favorite

Please, take a look at the following CMD

[thunder@ip-xxx-xx-xx-xx /]$ id
uid=504(thunder) gid=504(thunder) groups=504(thunder)

[thunder@ip-xxx-xx-xx-xx /]$ grep developers /etc/group
developers:x:505:501,502,503,504

[thunder@ip-xxx-xx-xx-xx /]$ groups
thunder

My question is why doesn't developers show up in my groups command

Below you can see

[thunder@ip-xxx-xx-xx-xx opt]$ ls -l
total 12
drwxr-xr-x 5 root root 4096 Mar 7 06:46 aws
-rwxr-xr-x 1 root root 63 Mar 23 22:37 permissions.sh
drwxrwxr-x 7 root developers 4096 Mar 26 19:30 web

The "web" folder has developers as its group,
but still I cannot perform this inside the "web" folder

[thunder@ip-xxx-xx-xx-xx opt]$ cd web
[thunder@ip-xxx-xx-xx-xx web]$ touch a
touch: cannot touch Ã¢Â€Â˜aÃ¢Â€Â™: Permission denied

Note: I tried logging out and logging back in using the logout and exit command, but still no success.

asked Mar 28 at 21:25

ThunderRoid

1063

add a commentÂ |Â

up vote
1
down vote

favorite

Please, take a look at the following CMD

[thunder@ip-xxx-xx-xx-xx /]$ id
uid=504(thunder) gid=504(thunder) groups=504(thunder)

[thunder@ip-xxx-xx-xx-xx /]$ grep developers /etc/group
developers:x:505:501,502,503,504

[thunder@ip-xxx-xx-xx-xx /]$ groups
thunder

My question is why doesn't developers show up in my groups command

Below you can see

[thunder@ip-xxx-xx-xx-xx opt]$ ls -l
total 12
drwxr-xr-x 5 root root 4096 Mar 7 06:46 aws
-rwxr-xr-x 1 root root 63 Mar 23 22:37 permissions.sh
drwxrwxr-x 7 root developers 4096 Mar 26 19:30 web

The "web" folder has developers as its group,
but still I cannot perform this inside the "web" folder

[thunder@ip-xxx-xx-xx-xx opt]$ cd web
[thunder@ip-xxx-xx-xx-xx web]$ touch a
touch: cannot touch Ã¢Â€Â˜aÃ¢Â€Â™: Permission denied

Note: I tried logging out and logging back in using the logout and exit command, but still no success.

asked Mar 28 at 21:25

ThunderRoid

1063

Please, take a look at the following CMD

[thunder@ip-xxx-xx-xx-xx /]$ id
uid=504(thunder) gid=504(thunder) groups=504(thunder)

[thunder@ip-xxx-xx-xx-xx /]$ grep developers /etc/group
developers:x:505:501,502,503,504

[thunder@ip-xxx-xx-xx-xx /]$ groups
thunder

My question is why doesn't developers show up in my groups command

Below you can see

[thunder@ip-xxx-xx-xx-xx opt]$ ls -l
total 12
drwxr-xr-x 5 root root 4096 Mar 7 06:46 aws
-rwxr-xr-x 1 root root 63 Mar 23 22:37 permissions.sh
drwxrwxr-x 7 root developers 4096 Mar 26 19:30 web

The "web" folder has developers as its group,
but still I cannot perform this inside the "web" folder

[thunder@ip-xxx-xx-xx-xx opt]$ cd web
[thunder@ip-xxx-xx-xx-xx web]$ touch a
touch: cannot touch Ã¢Â€Â˜aÃ¢Â€Â™: Permission denied

Note: I tried logging out and logging back in using the logout and exit command, but still no success.

permissions users groups

asked Mar 28 at 21:25

ThunderRoid

1063

asked Mar 28 at 21:25

ThunderRoid

1063

asked Mar 28 at 21:25

ThunderRoid

1063

asked Mar 28 at 21:25

ThunderRoid

1063

asked Mar 28 at 21:25

ThunderRoid

1063

add a commentÂ |Â

1 Answer
1

active

oldest

votes

up vote
1
down vote

man 5 group states that the forth section of each line is (emphasis added):

a list of the usernames that are members of this group, separated by commas.

Having numeric user IDs in this list doesn't seem to work.

I think you have to use something like

sudo gpasswd -a $USER developers

sudo usermod $USER -aG developers

to actually add yourself to the developers group.

After that, logout and re-login, then use

id -Gn

to get a list of your groups.

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

answered Mar 28 at 21:41

Ravexina

28k146595

but to run sudo gpasswd i will need root access which i don't have
â€“Â ThunderRoid
Mar 28 at 21:53

@ThunderRoid You have to ask the administrator then... because you are not really in developers group.
â€“Â Ravexina
Mar 28 at 21:56

but grep developers /etc/group shows that i am, because it has my uid, as u can see in op
â€“Â ThunderRoid
Mar 28 at 21:57

1

There should be a list of the "usernames" not "user id", I tested it on my local machine... uid does not works. I also quoted a line from /etc/group manual page: " a list of the usernames that are members of this group, separated by commas."
â€“Â Ravexina
Mar 28 at 21:59

1

I edited your answer to emphasize that one has to put the user names into /etc/groups, not the UIDs. At least for me, that wasn't too clear until I saw your comment above. Btw, another (more common?) command to add a USER to a GROUP is sudo adduser USER GROUP.
â€“Â Byte Commander
Mar 28 at 22:57

Â |Â
show 4 more comments

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1 Answer
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active

oldest

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up vote
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down vote

man 5 group states that the forth section of each line is (emphasis added):

a list of the usernames that are members of this group, separated by commas.

Having numeric user IDs in this list doesn't seem to work.

I think you have to use something like

sudo gpasswd -a $USER developers

sudo usermod $USER -aG developers

to actually add yourself to the developers group.

After that, logout and re-login, then use

id -Gn

to get a list of your groups.

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

answered Mar 28 at 21:41

Ravexina

28k146595

but to run sudo gpasswd i will need root access which i don't have
â€“Â ThunderRoid
Mar 28 at 21:53

@ThunderRoid You have to ask the administrator then... because you are not really in developers group.
â€“Â Ravexina
Mar 28 at 21:56

but grep developers /etc/group shows that i am, because it has my uid, as u can see in op
â€“Â ThunderRoid
Mar 28 at 21:57

1

There should be a list of the "usernames" not "user id", I tested it on my local machine... uid does not works. I also quoted a line from /etc/group manual page: " a list of the usernames that are members of this group, separated by commas."
â€“Â Ravexina
Mar 28 at 21:59

1

I edited your answer to emphasize that one has to put the user names into /etc/groups, not the UIDs. At least for me, that wasn't too clear until I saw your comment above. Btw, another (more common?) command to add a USER to a GROUP is sudo adduser USER GROUP.
â€“Â Byte Commander
Mar 28 at 22:57

Â |Â
show 4 more comments

up vote
1
down vote

man 5 group states that the forth section of each line is (emphasis added):

a list of the usernames that are members of this group, separated by commas.

Having numeric user IDs in this list doesn't seem to work.

I think you have to use something like

sudo gpasswd -a $USER developers

sudo usermod $USER -aG developers

to actually add yourself to the developers group.

After that, logout and re-login, then use

id -Gn

to get a list of your groups.

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

answered Mar 28 at 21:41

Ravexina

28k146595

but to run sudo gpasswd i will need root access which i don't have
â€“Â ThunderRoid
Mar 28 at 21:53

@ThunderRoid You have to ask the administrator then... because you are not really in developers group.
â€“Â Ravexina
Mar 28 at 21:56

but grep developers /etc/group shows that i am, because it has my uid, as u can see in op
â€“Â ThunderRoid
Mar 28 at 21:57

1

There should be a list of the "usernames" not "user id", I tested it on my local machine... uid does not works. I also quoted a line from /etc/group manual page: " a list of the usernames that are members of this group, separated by commas."
â€“Â Ravexina
Mar 28 at 21:59

1

I edited your answer to emphasize that one has to put the user names into /etc/groups, not the UIDs. At least for me, that wasn't too clear until I saw your comment above. Btw, another (more common?) command to add a USER to a GROUP is sudo adduser USER GROUP.
â€“Â Byte Commander
Mar 28 at 22:57

Â |Â
show 4 more comments

up vote
1
down vote

man 5 group states that the forth section of each line is (emphasis added):

a list of the usernames that are members of this group, separated by commas.

Having numeric user IDs in this list doesn't seem to work.

I think you have to use something like

sudo gpasswd -a $USER developers

sudo usermod $USER -aG developers

to actually add yourself to the developers group.

After that, logout and re-login, then use

id -Gn

to get a list of your groups.

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

answered Mar 28 at 21:41

Ravexina

28k146595

man 5 group states that the forth section of each line is (emphasis added):

a list of the usernames that are members of this group, separated by commas.

Having numeric user IDs in this list doesn't seem to work.

I think you have to use something like

sudo gpasswd -a $USER developers

sudo usermod $USER -aG developers

to actually add yourself to the developers group.

After that, logout and re-login, then use

id -Gn

to get a list of your groups.

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

answered Mar 28 at 21:41

Ravexina

28k146595

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

edited Mar 28 at 22:55

Byte Commander

59.5k26159267

answered Mar 28 at 21:41

Ravexina

28k146595

answered Mar 28 at 21:41

Ravexina

28k146595

answered Mar 28 at 21:41

Ravexina

28k146595

but to run sudo gpasswd i will need root access which i don't have
â€“Â ThunderRoid
Mar 28 at 21:53

@ThunderRoid You have to ask the administrator then... because you are not really in developers group.
â€“Â Ravexina
Mar 28 at 21:56

but grep developers /etc/group shows that i am, because it has my uid, as u can see in op
â€“Â ThunderRoid
Mar 28 at 21:57

1

There should be a list of the "usernames" not "user id", I tested it on my local machine... uid does not works. I also quoted a line from /etc/group manual page: " a list of the usernames that are members of this group, separated by commas."
â€“Â Ravexina
Mar 28 at 21:59

1

I edited your answer to emphasize that one has to put the user names into /etc/groups, not the UIDs. At least for me, that wasn't too clear until I saw your comment above. Btw, another (more common?) command to add a USER to a GROUP is sudo adduser USER GROUP.
â€“Â Byte Commander
Mar 28 at 22:57

Â |Â
show 4 more comments

but to run sudo gpasswd i will need root access which i don't have
â€“Â ThunderRoid
Mar 28 at 21:53

@ThunderRoid You have to ask the administrator then... because you are not really in developers group.
â€“Â Ravexina
Mar 28 at 21:56

but grep developers /etc/group shows that i am, because it has my uid, as u can see in op
â€“Â ThunderRoid
Mar 28 at 21:57

1

There should be a list of the "usernames" not "user id", I tested it on my local machine... uid does not works. I also quoted a line from /etc/group manual page: " a list of the usernames that are members of this group, separated by commas."
â€“Â Ravexina
Mar 28 at 21:59

1

I edited your answer to emphasize that one has to put the user names into /etc/groups, not the UIDs. At least for me, that wasn't too clear until I saw your comment above. Btw, another (more common?) command to add a USER to a GROUP is sudo adduser USER GROUP.
â€“Â Byte Commander
Mar 28 at 22:57

but to run sudo gpasswd i will need root access which i don't have
â€“Â ThunderRoid
Mar 28 at 21:53

@ThunderRoid You have to ask the administrator then... because you are not really in developers group.
â€“Â Ravexina
Mar 28 at 21:56

but grep developers /etc/group shows that i am, because it has my uid, as u can see in op
â€“Â ThunderRoid
Mar 28 at 21:57

There should be a list of the "usernames" not "user id", I tested it on my local machine... uid does not works. I also quoted a line from /etc/group manual page: " a list of the usernames that are members of this group, separated by commas."
â€“Â Ravexina
Mar 28 at 21:59

I edited your answer to emphasize that one has to put the user names into /etc/groups, not the UIDs. At least for me, that wasn't too clear until I saw your comment above. Btw, another (more common?) command to add a USER to a GROUP is sudo adduser USER GROUP.
â€“Â Byte Commander
Mar 28 at 22:57

Â |Â
show 4 more comments

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