#mount

"umount: target is busy": find what holds the filesystem, and when umount -l is safe

Fix "umount: target is busy" on Linux: find the process with lsof or fuser, leave the folder, stop services, handle NFS and bind mounts, and know when umount -l is safe.

Beginner · 4 min read

Read-only file system

Linux

"Read-only file system" on Linux: why the disk went read-only, and how to fix it safely

Fix "Read-only file system" errors: find the read-only mount, read dmesg to see why the kernel did it, then repair with fsck — and check whether the disk is failing.

Intermediate · 4 min read