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Can somebody please advise, is it possible to create a single symlink that would point to different files depending on user?
Example:
user symlink would route requests from user1 to the "user1" file and would route to the "user2" file for user2
lrwxrwxrwx 1 root root 5 Feb 17 11:00 user -> user1
-rw-r--r-- 1 root root 0 Feb 17 11:00 user1
-rw-r--r-- 1 root root 0 Feb 17 11:00 user2
Could not find any information yet.
Thank you
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I have the bzcat command with the following permissions:
-rwxr-xr-x 3 root root 39144 Sep 5 2019 /bin/bzcat
I have the bzmore command with the following permissions:
-rwxr-xr-x 1 root root 1297 Sep 5 2019 /bin/bzmore
And I have a bz2 zip file:
-r-------- 1 root root 61 Feb 17 14:37 flag.bz2
When I use bzmore flag.bz2 it works fine. But when I use bzcat flag.bz2 I get Can't open input file flag.bz2: Permission denied.. Why is this? If I put sudo in front of bzcat it works fine too but why doesn't bzmore need this when they both have the same permissions.
I tried running all the commands to test out what happened.
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Ubuntu 20 LTS, Installed laradock,
in Ubuntu
$ pwd
/root/Docker
$ ls
blog laradock
$ rsync -a /media/sf_code/blog . && chmod -R 755 blog
$ cd laracock
$ docker-compose exec --user=root workspace bash
in docker
> ll
total 20
drwxr-xr-x 4 laradock laradock 4096 Nov 12 06:52 ./
drwxr-xr-x 1 root root 4096 Nov 12 02:30 ../
drwxr-xr-x 12 root 998 4096 Nov 12 03:09 blog/
drwxr-xr-x 74 laradock laradock 4096 Nov 12 06:35 laradock/
what does 998 mean?
The 4th column is the group id. It there is an entry in /etc/group with this id, then the group name will be printed otherwise the id.
The your example the group id of folder blog is 998 but no group exist inside the container with this id. Mapping a folder to a docker container does not change owner or group.
Some explanation can be found here
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I have created a soft link as follows:
/bip/etl>ln -s /bip/etl bipet
And now can see the soft link being created as well..
/bip/etl>ls -lrt |tail
-rw-rw-rw- 1 cdtbipx cduserg 24988174 Jun 19 19:17 227015716_WLR3PSTN_Filtered_06202016_5of6.csv.gz.gpg
-rw-rw-rw- 1 cdtbipx cduserg 23857587 Jun 19 19:17 227015716_WLR3PSTN_Filtered_06202016_6of6.csv.gz.gpg
drwxrwxrwx 1082 prod release 61440 Jul 3 02:51 WSC
drwxrwxrwx 5 oracle oinstall 4096 Jul 4 01:22 dsl
lrwxrwxrwx 1 cdtbipx cduserg 8 Jul 4 08:43 bipet -> /bip/etl
However, I cannot refer to the soft link bipet while I try to search a specific file in the concerned folder.
ls -lrt /bipetl/227015716_WLR3PSTN_Filtered_06202016_6of6.csv.gz.gpg
ls: /bipetl/227015716_WLR3PSTN_Filtered_06202016_6of6.csv.gz.gpg: No such file or directory
What am I doing wrong here?
You created a link bipet in directory /bip/etl (current working directory when you did ln).
You you should do:
ls -lrt /bip/etl/bipetl/227015716_WLR3PSTN_Filtered_06202016_6of6.csv.gz.gpg
Or create the link using (assuming you have privileges to write to the /):
ln -s /bip/etl /bipet
And then you can do:
ls -lrt /bipetl/227015716_WLR3PSTN_Filtered_06202016_6of6.csv.gz.gpg
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I have problem with Ubuntu.
I'm trying add user tbalicek to group www-data but the following commands doesn't work.
tbalicek#UBK-LINUX:/var/www$ sudo usermod -a -G www-data tbalicek
tbalicek#UBK-LINUX:/var/www$ groups
tbalicek sudo
tbalicek#UBK-LINUX:/var/www$ groups tbalicek
tbalicek : tbalicek www-data
I don't understand why groups and groups tbalicek return different results?? When I'm loged like tbalicek
When I'm trying mkdir like tbalicek in folder where si own group www-data I get: permission denied
tbalicek#UBK-LINUX:/var/www$ ls -ltr
total 20
-rwxrwxr-x 1 www-data www-data 31 Mar 27 13:52 index.php
drwxrwxr-x 9 www-data www-data 4096 Mar 27 17:16 pelnar
drwxrwxr-x 16 www-data www-data 4096 Mar 27 17:21 redmine
drwxrwxr-x 9 www-data www-data 4096 Apr 3 17:54 taskagent
-rwxrwxr-x 1 root root 22 Apr 10 14:35 info.php
tbalicek#UBK-LINUX:/var/www$
Group assignments don't take effect in the current shell. You have to log out and log back in to see the group changes.
From the Debian Wiki for sudo:
After being added to a new group the user must log out and then log back in again for the new group to take effect. Groups are only assigned to users at login time. A most common source of confusion is that people add themselves to a new group but then do not log out and back in again and then have problems because the group is not assigned.
You might get a better response for this sort of question on ServerFault.
Try the newgrp command:
ts#cmp:~$ id
uid=1001(ts) gid=1001(ts) groups=1001(ts),27(sudo)
ts#cmp:~$ newgrp www-data
ts#cmp:~$ id
uid=1001(ts) gid=33(www-data) groups=1001(ts),27(sudo),33(www-data)
Just a nitpick, 'sudo adduser user group' will also add a user to a group and I find the syntax easier to remember than using usermod.
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I'm looking at the output of find . -ls. For example, here is a small excerpt for /lib64 on a CentOS system:
163542 28 -rwxr-xr-x 1 root root 28448 Aug 4 2010 ./libvolume_id.so.0.66.0
163423 0 lrwxrwxrwx 1 root root 16 Mar 3 2010 ./libwrap.so.0 -> libwrap.so.0.7.6
163601 0 lrwxrwxrwx 1 root root 11 Nov 9 2010 ./libc.so.6 -> libc-2.5.so
The find(1) man page says "list current file in ls -dils format on standard output". I then tried to figure it out from ls(1) man page, but I'm stumped on the second column. Any idea?
For reference: the columns (with ref. for the first line) are:
inode 163542
??? 28 what is this? stat that file doesn't mention any field equals to '28'
permissions -rwxr-xr-x
hard-links 1
owner root
group root
size(bytes) 28448
modified Aug 4 2010
name ./libvolume_id.so.0.66.0
(for logical links: -> softlink)
Doh, a casual regression against size reveals that it's roughly the number of 1024-byte blocks...