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Show free disk space on all filesystems

harmlessFilesystemalle
user@server
df -hT -x tmpfs -x devtmpfs -x squashfs

Lists all mounted filesystems with type, total size, used space and percentage. Virtual filesystems such as tmpfs are hidden to keep the overview readable. Act at around 90 percent usage, since databases and mail servers throw errors when the disk is full.

Note: If free space is shown but writes still fail, the inodes are often exhausted (df -i).

Also searched as

  • how much disk space is left linux
  • check if disk is full
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  • show disk usage

Related one-liners

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Check inode usage of filesystems

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

Empty a file without deleting it

$truncate -s 0 -- /var/www/vhosts/example.com/logs/error_log
destructiveFilesystem

Find deleted files still held open

#lsof -nP +L1
harmlessFilesystem

Find the largest files in a directory

$find /var/www/vhosts -type f -size +500M -exec ls -lh {} + 2>/dev/null | sort -k5 -rh | head -20
harmlessFilesystem

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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.

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  • Make a backup first and, if possible, try it on a test system.
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