First, the role of each directory
bin (binary) --- executable file that is command, which all users have execute permissions
boot ---- boot files (kernel file)
dev ---- hardware is abstracted file
etc ----- All configuration files (.configura mostly as a text file)
home ------ user's home directory to save all files in all equivalent to my files
directory is the root ------ alone
lib ------ All library files, library files needed to run Linux programs of import. .
When you insert a media ---- U disk or other things automatically mount in this directory (this directory does not have)
mnt ----- equivalent media (all systems must have this directory)
opt ------ usually empty, half mounted on a huge software
proc ------ virtual folder exists only in the absence of hard disk memory, display real-time information system
cd /proc/
ls
ll
cat cpuinfo
sbin ---- only the root user can support this order inside
sys ------- bottom of the system information, the underlying hardware information
temp ------- temporary information. Every few days will be automatically deleted
usr -------- software usually installed in the default directory
var ----------- constantly changing information, such as log
