File System
EXT 2
lsattr shows the ext2-attributes.
chattr change the ext2-attributes.
The special attributes indicate wheather a file is append-only or even immutable.
See also: Network Security: File Permissoins
Partitions
There a couple of tools to partition:
sfdisk
cfdisk A graphical (textmode) tool.
Checking a filesystem
fsck -f -y /dev/hda1 -f forces the check. -y answers yes to all the questions
Mounting
| /dev/sda2 | swap | swap | defaults | 0 | 0 |
| /dev/sda3 | / | ext2 | noauto,user | 1 | 1 |
The flags you can user: noexec, nosuid, nodev (are implied by user)
Use the noatime flag to suppress the generation of the ATIME flag on files. This can speed up your harddisk access quite a bit.
Loopback Drive
To create a virtual file system, first create an empty file to hold the virtual file system. The size of the file will be the apparent size of the loopback device after it is mounted.
dd if=/dev/zero of=/tmp/lbdisk count=20480
Before you mount the above file, you must construct a file system.
mke2fs -q /tmp/lbdisk
Mount the file system using the loopback device:
mkdir /mnt/loopback
mount -o loop=/dev/loop0 /tmp/lbdisk /mnt/loopback
Tune2fs
The tune2fs utility helps control harddisk parameters. You can set after how many mountes a drive is going to be checked, \ldots
Debugging a filesystem
debugfs /dev/hda3 runs a debugger for the filesystem. Use lsdel to display the deleted files. If you wanna recover a deleted file, use dump <xxx> /home/ram/file (where xxx is the inode) to recover a file.
There is also a product which does file recovery: RECOVER
Wanna have encrypted tar-archives, use: STAR. And then -e
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CopyLeft (l) 2003 by Raffael Marty
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