For checking the memory as in RAM
free
/proc/meminfo
Disk Space
du shows what is visible
df shows the filesystem
$ du -S /export/opt | sort –n | less
[root@xxx~]# df -h /export/opt
df -h /export/opt
df -k .
df -k
/dev/mapper/datavg-cdo
69565928 32097284 33934820 49% /export/opt
du -h --max-depth=1 à for folder level memory usage
du -ch *
à gives you the individual files and also a total at the end
du -sh *
à gives you the individual files
du -h *
du -h 155646_CDOTM_REFLKUP_START_out
du –sh
du | sort –n
du -h | less