1, DU or DU -S or DU -K (listed in 1024 bytes) Disk space usage)
Du -s | sort -n can quickly find that directory is the biggest.
du -sm
DU -SM / USR
2. Use DF -H to see the space size of the installed file system and the remaining space size (H represents in m).
3, Quota -V View the user's disk space information, if you limit the user's space size with quota.
