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Linux Filesystem Quotas

quotacheck — scan filesystem for disk usage

quotacheck scans a filesystem and updates quota files with current disk usage information for users and groups.

What quotacheck is good for

Run on unmounted filesystems when possible to avoid inconsistencies. May require quota support enabled in fstab (usrquota, grpquota).
Typical workflow: quotacheck → quotaon → edquota

10 Practical Examples

1) Check user quotas

sudo quotacheck -u /home

2) Check group quotas

sudo quotacheck -g /home

3) Check both user and group

sudo quotacheck -ug /home

4) Force check

sudo quotacheck -f -ug /home

5) Create quota files if missing

sudo quotacheck -cug /home

6) Verbose output

sudo quotacheck -vug /home

7) Check all quota-enabled filesystems

sudo quotacheck -avug

8) Turn quotas on after check

sudo quotaon /home

9) Edit quota limits

sudo edquota username

10) Report current usage

quota -u username