How to check if a new username is a system user?
I want to create a script that change a username. I want to check if the user is not a system user. My idea is to check /etc/passwd and pick only users wi...
03 Apr 2026 0 READS
User Prof-Wiz - Ask Ubuntu
Q&A for Ubuntu users and developers
03 Apr 2026 0 READS
Ubuntu 20 no WI-FI after every update
I have the no Wi-Fi problem. I solved it in the first place by plugin a mobile device with an internet connection and installed third party drivers. The p...
03 Apr 2026 0 READS
External drive keeps getting mounted under /media/ even though I have it in fstab under /mnt
I have 3 physical external USB drives. All are btrfs. Two are combined into a single volume, the other is not. The two volumes are both in /etc/fstab to b...
03 Apr 2026 0 READS
Sendmail configuration
I have done the following: Install sendmail and configure /etc/mail/sendmail.mc by adding line: DAEMON_OPTIONS(‘Family=inet, Name=MTA-v4, Port=smtp, ...
03 Apr 2026 0 READS
![CHMOD 400 not working trying to ssh to amazon instance [closed]](https://edu.smbbmcl.edu.pk/uploads/chmod-400-not-working-trying-to-ssh-to-amazon-instance-closed_720.jpg)
CHMOD 400 not working trying to ssh to amazon instance [closed]
I am trying to ssh to amazon instance with my .pem file however CHMOD 400 is not working as it says “this command is not available”. It works on my mac te...
03 Apr 2026 0 READS
How to debug ssh incoming connections?
I'm having troubles ssh-ing to a server (ubuntu 16.04) I have root access to from my machine (macOS 10.12). The situation is weird: I checked that ss...
03 Apr 2026 0 READS
How can I change the date and time on Ubuntu?
When I go to change the date and time it doesn't work. I try to unlock but it just won't unlock. If there is any way to make it work please help...
03 Apr 2026 0 READS
How do I set a system wide proxy with a username and password?
I'm trying to set a system wide proxy, and I'm specifically having difficulties with apt-get for installing applications on my Ubuntu. I'm ...
03 Apr 2026 0 READS
![copy to clipboard current path from console with no mouse [duplicate]](https://edu.smbbmcl.edu.pk/uploads/copy-to-clipboard-current-path-from-console-with-no-mouse-duplicate_720.jpg)
copy to clipboard current path from console with no mouse [duplicate]
I'm wondering if it possible to copy to clipboard output of pwd command. I often need to copy some path and I have to select it with mouse, do severa...
03 Apr 2026 0 READS
