Questions tagged [uid]
The uid tag has no usage guidance.
23
questions
5
votes
3
answers
7k
views
Why on some systems max uid/gid is 65534 an not 65535?
I know that there is not a shared maximum value for uid (or gid): some systems use 99 (Slackware, ...), others 65534 (Debian, ...).
I ask if there is a specific motivation to use 65534 and not 65535 (...
5
votes
3
answers
14k
views
How to change user ID on a QNAP NAS?
I've got a QNAP TS-110 which I access via NFS from my Ubuntu system.
I guess that NFS on a typical home network does not use any user authentication.
I've read in various places and I found that it ...
2
votes
2
answers
356
views
gksu is a front end to su?
gksu manual page says that it is a front-end to su, however su doesn't need a command to be executed, while gksu does. Also, gksu doesn't seem to change the user ID of my shell, while su does. Is it ...
2
votes
2
answers
2k
views
UID is root but whoami says nobody
I'm participating in a capture-the-flag contest where I must implement some form of privilege escalation to read the flag.txt file. I've noticed that when I run whoami I get the following result:
...
1
vote
2
answers
1k
views
Access Volume via UID in PowerShell
I do have a Server with plenty of volumes where some are mounted in different directories and others have drive letters.
I´m looking for a way to run something like this in Powershell
foreach ($...
1
vote
1
answer
2k
views
No user list in the login screen after changing the user ID
Edit: Problem 1 has been resolved.
I followed this link and changed my user id to 1000 (same as Linux user id), so that I can share files freely between Mac and Linux. Now I have these two problems:
...
1
vote
1
answer
449
views
Mount of device not owned by requested user
Using Ubuntu 18.04. When logging into a tty terminal of a PC, the dmesg lines
[ 83.966238] Mount of device (uid: 0) not owned by requested user (uid: 1000)
[ 83.966795] Reading sb failed; rc = [-1]...
1
vote
1
answer
854
views
uid of process not in /etc/passwd
I'm building a toy system monitor for which I parse multiple files from /proc.
Among other values I parse the uid for every process from /proc/$pid/status. Later I map the process' uid to the username ...
1
vote
1
answer
764
views
Migrate Windows UID to another installation
In Linux when I want to share user data and credentials, I only need to ensure that the same user shares the same POSIX UID and GID (typically starting from 1000) across two Linux installations on the ...
1
vote
1
answer
2k
views
How do I change UID of 0 from non-root user?
I have set the UID of user01 to be 0 when I created it. Now I am trying to delete the user and it complains "user01 is currently logged in". I check the process list, and that doesn't seem to be ...
1
vote
1
answer
536
views
Why can I access my home directory when booting from an external drive?
I run fedora 30 on my computer. As user foo, my home directory rights look like this:
[foo@localhost]$ ls -l /home/
drwx------. 41 foo foo 4.0K Jul 12 11:23 foo
drwx------. 2 root root 16K Jul 18 ...
0
votes
2
answers
854
views
How do I get string username/groupname from numeric uid/gid on remote host in an SFTP session?
I'm automating file transfer via SFTP and got stuck when changing file ownership in the remote host. The problem is that SFTP's chown and chgrp commands only accept numeric uids/gids, which are not ...
0
votes
2
answers
887
views
How to find Mac OSX UID from Ubuntu
How do you view Mac OSX user id without having to boot into OSX? I can mount the drive, but I can't find the UID for my user, which would hopefully enable me to access files without being root.
0
votes
1
answer
499
views
bad uid 8 in virtual_uid_maps
Sending mail fails. Logs show this error:
warning: recipient [email protected]: bad uid 8 in virtual_uid_maps
Relevant settings in main.cf:
local_recipient_maps =
virtual_uid_maps = static:8
...
0
votes
1
answer
4k
views
Mac OS X: Change UID or permissions?
I keep the /Users directory on a separate hard drive, /Volumes/Media. I recently upgraded my main drive via a fresh install from Mavericks to Yosemite. I have two users (not including root): seamus (...
0
votes
1
answer
119
views
jsfiddle unique identifier generation [closed]
Consider jsfiddle.net:
When you press "save" they generate uid for your jsfiddle like vzBZB.
How do they do it? Why only 5 characters?
And first of all - How do they make sure there's never a ...
0
votes
0
answers
19
views
Why does external server register uid instead of username of user-generated user?
I'm running a cluster in Ubuntu generated by AWS ParallelCluster. When I run the cluster as the default user "ubuntu" with uid:gid 1000:1000, the cluster calls to a license manager on a ...
0
votes
1
answer
1k
views
Uid and gid relation to file permissions
I'm confused about what effect the uid or gid has on the ability of a process to execute a file. I read the section I could find on them in APUE, but I must have missed the part where Stevens explains ...
0
votes
1
answer
461
views
changed root UID in ubuntu
I was tinkering with the /etc/passwd file when accidentaly changed the root UID and GID.
When I enter into the recovery mode, I still have no superuser powers, as any user exists on the passwd file ...
0
votes
0
answers
1k
views
how do I get the PID list and USERNAME of each of those PIDs in LINUX using python?
I am trying to get the PID's and their respective usernames for displaying something similar to the top command in linux. I managed to get the list of PIDs but I am unable to fetch any username for ...
0
votes
1
answer
2k
views
root user uid got changed
I am using ubuntu server. My root account uid got changed to 0 to 1, i am not sure when and how.
Becausse of this i cant execute any sudo commands on this server. This is what rroot account looks like ...
0
votes
0
answers
497
views
How do I keep the same UID among many servers?
I have many servers with LDAP which mantain the users UID the same among the servers, but how can I change and keep the same UID for local users ?
For example, the user tomcat, when someone create an ...
-1
votes
2
answers
922
views
cron uid:gui for every username
So in the nutshell :
There was user John with 502:502.
After i deleted John and recreated him, his UID:GID changed to 504:504.
Cronjobs are still running under the John's crontab, but when the ...