Developer Q&A — ask, answer, and find what worked

8votes

1answer

1664views

How to fix broken package dependencies on Ubuntu

I'm getting "unmet dependencies" error when trying to install packages with apt. apt install -f doesn't work. How to fix this?

ubuntu apt packages dependencies

sysadmin asked 9 months, 1 week ago

22votes

1answer

1921views

My custom service fails to start with systemctl. It just says "failed" without useful information. How can I debug this?

linux systemd services debugging

security_pro asked 9 months, 1 week ago

22votes

1answer

747views

My server shows "No space left on device" error but df -h shows 40% free space. What is causing this and how to fix it?

linux server disk-space troubleshooting

python_dev asked 9 months, 1 week ago

47votes

1answer

2062views

I cannot connect to my server via SSH. I get "Connection refused" error. The server is running and I can ping it. What could be wrong?

linux firewall ssh networking

youssef_net asked 9 months, 1 week ago

8votes

1answer

751views

I'm getting "Permission denied" errors when trying to run commands with sudo. The error says my user is not in the sudoers file. How can I fix this?

linux ubuntu sudo permissions

noor_code asked 9 months, 1 week ago