Files And File Systems - Novell LINUX ENTERPRISE DESKTOP 10 SP2 - DEPLOYMENT GUIDE 08-05-2008 Deployment Manual

14.2 Files and File Systems

14.2.1 Determine the File Type: file
The command file determines the type of a file or a list of files by checking /etc/
magic.
tux@mercury:~> file /usr/bin/file
/usr/bin/file: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), \
for GNU/Linux 2.2.5, dynamically linked (uses shared libs), stripped
The parameter -f list specifies a file with a list of filenames to examine. The -z
allows file to look inside compressed files:
tux@mercury:~> file /usr/share/man/man1/file.1.gz
usr/share/man/man1/file.1.gz: gzip compressed data, from Unix, max compression
tux@mercury:~> file -z /usr/share/man/man1/file.1.gz
/usr/share/man/man1/file.1.gz: ASCII troff or preprocessor input text \
(gzip compressed data, from Unix, max compression)
14.2.2 File Systems and Their Usage: mount,
The command mount shows which file system (device and type) is mounted at which
mount point:
tux@mercury:~> mount
/dev/sda3 on / type reiserfs (rw,acl,user_xattr)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
udev on /dev type tmpfs (rw)
devpts on /dev/pts type devpts (rw,mode=0620,gid=5)
/dev/sda1 on /boot type ext2 (rw,acl,user_xattr)
/dev/sda4 on /local type reiserfs (rw,acl,user_xattr)
/dev/fd0 on /media/floppy type subfs (rw,nosuid,nodev,noatime,fs=floppyfss,p
332 Deployment Guide
df, and du