DE

↑ ↓ select, Enter open, Esc close

Show disk space used by the systemd journal

harmless rootsystemddebian, ubuntu
root@server
journalctl --disk-usage

Prints the total size of all active and archived journal files. Without a limit, journald may use up to 10 percent of the file system (at most 4 GB), which is noticeable on small servers. If the value is too high, the journal can be shrunk and permanently limited.

Also searched as

  • how big is the journal
  • var log journal too big
  • journalctl disk usage
  • journal is using a lot of space

Related one-liners

All in systemd

Shrink the systemd journal to a maximum size

#journalctl --vacuum-size=500M
destructivesystemd

Permanently limit the size of the systemd journal

#mkdir -p /etc/systemd/journald.conf.d && printf '[Journal]\nSystemMaxUse=500M\n' > /etc/systemd/journald.conf.d/size.conf && systemctl restart systemd-journald
cautionsystemd

Analyze disk usage interactively with ncdu

$ncdu -x /var
harmlessFilesystem

Calculate the total size of all files of one type

$find /var/www/vhosts/example.com/httpdocs/wp-content/uploads -type f -iname '*.mp4' -printf '%s\n' | awk '{s+=$1; n++} END {printf "%d Dateien, %.1f MB\n", n, s/1048576}'
harmlessFilesystem

Check inode usage of filesystems

$df -ih -x tmpfs -x devtmpfs -x squashfs
harmlessFilesystem

Clean up unused Docker data

#docker system prune
cautionDocker

Read first, then run.

The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

  • All commands are provided without warranty and are not tested on every system.
  • Understand what a command does before running it, and check every placeholder.
  • Make a backup first and, if possible, try it on a test system.
  • You run commands at your own risk. Liability for damages is excluded to the extent permitted by law.