Find loaded filesystem modules
Build a paste-ready command, then review its compatibility and effects before running it.
lsmod | rg '^(xfs|btrfs|ext4|zfs)'read-onlyno known side effects Compatibility
LinuxVerified for Linux using posix, bash, zsh syntax.
Operational knowledgereview due 2027-01-20
Requirementslsmodlsmod must be installed and available on PATH.
Version supportlsmod Current supported releasesVerified for linux using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.
Expected signalsxfs 1900544 1Representative successful output; values vary with the selected target and system state.
Known errorslsmod: command not foundlsmod is missing or is not available on PATH.
Verifylsmod | rg '^(xfs|btrfs|ext4|zfs)'The output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.
Command breakdown
01lsmodCommandRuns the lsmod stage of this one-liner.
02|PipelinePasses the output on the left to the command on the right.
03rgCommandRuns the rg stage of this one-liner.
04'^(xfs|btrfs|ext4|zfs)'ArgumentPasses '^(xfs|btrfs|ext4|zfs)' to rg.
Example input
lsmod | rg '^(xfs|btrfs|ext4|zfs)'
Example output
xfs 1900544 1
Illustrative output — exact values vary by system and data.
Official sources