Linux Filesystem

WeeSan Lee

Roadmap

Disk Partitions The Filesystem Filesystem Mouting & Umounting File Tree File Type File Permission

Disk Partitions

Logical disk 4 primary partitions Can be extended by extended partition

To display $ fdisk –l

To partition $ fdisk /dev/sda m help p display partition info n new a partition d delete a partition l list known partition type t change partition id

Filesystem

A method for storing and origanizing files on Linux/Unix

For example /

bin usr

Filesystem Mouting & Umounting To mount a filesystem to a mount point

$ mount /dev/sda2 /import /etc/fstab

mount –a To umount a filesystem

$ umount /import To find who is using the resource

$ fuser –mv /mnt To find out what’s currently mounted

$ mount $ cat /etc/mtab

File Tree

/bin /boot /dev /etc /home /lib /root /sbin /usr /usr/local /var /tmp /import

File Type

7 types Regular file

$ find -print0 | xargs -0 rm $ find public_html -size +4M -print0 | xargs -0 ls -l

Directory . ..

Character device file Block device file Unix socket Name pipe Symbol link

$ ln -s old new

File Permission

ls -t -r –h setuid, setgid, sticky chown chgrp chmod

-rwxrwxrwx umask

Reference

LAH Ch 5: The Filesystem