EC
EDQUOT
Linux / POSIXERRORNotableFilesystemHIGH confidence

Disk Quota Exceeded

Production Risk

Common in multi-user systems; applications should handle EDQUOT gracefully.

What this means

EDQUOT (errno 122) is returned when a write operation would exceed the user or group disk quota on the filesystem.

Why it happens
  1. 1User disk quota has been reached
  2. 2Group quota exceeded on a shared filesystem
  3. 3NFS quota exceeded on the remote filesystem
How to reproduce

write() that would exceed disk quota.

trigger — this will error
trigger — this will error
// Writing data that would exceed quota
ssize_t n = write(fd, buf, sizeof(buf));
// Returns -1, errno = EDQUOT

expected output

write: Disk quota exceeded (EDQUOT)

Fix 1

Check and increase disk quota

WHEN When users encounter EDQUOT

Check and increase disk quota
# Check current quota usage
quota -u username
# Show all quotas
repquota -a

# Increase quota for a user (as root)
edquota -u username
# Or set quota limits directly:
setquota -u username 5120000 5632000 0 0 /

Why this works

edquota edits quota limits; numbers are in filesystem blocks (usually 1KB each).

Fix 2

Clean up user files to free quota

WHEN When quota increase is not an option

Clean up user files to free quota
# Find large files consuming quota
du -sh ~/.* ~/* | sort -h | tail -20
# Remove unneeded files
rm -rf ~/old-project/

Why this works

Deleting files frees quota allocation; use du to identify the largest consumers.

Sources
Official documentation ↗

Linux Programmer Manual write(2)

quota(1) ↗

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