fc-cache
Scan font directories to build font cache files. tldr-pages
On several platforms
Several platforms
Generate font cache files
fc-cacheIdentifyGenerate font cache files verbosely
fc-cache --verboseIdentifyForce a rebuild of all font cache files, without checking if cache is up-to-date
fc-cache --forceIdentifyErase font cache files, then generate new font cache files
fc-cache --really-forceIdentifyScan a specific directory
fc-cache path/to/directoryIdentifyScan system-wide directories, skipping the user's home directory
fc-cache --system-onlyIdentifyDisplay version
fc-cache --versionIdentify