File System Types
| ext2 | Dont use this, use ext3. Has the concepts of blocks, inodes and directories. |
| ext3 | Most popular, ok scalability. enhanced with journalling, supports POSIX ACL |
| reiserFS | small files, scales bigger than ext3, made by guy who killed his wife and child |
| XFS | extremely scalable, large files, Video, SGI irix |
| NTFS | Microsoft journaled FS, general MS purpose |
| isofs | Used by CDROM file system |
| Sysfs | It is a ram-based filesystem initially based on ramfs. It is use to exporting kernel objects so that end user can use it easily. |
| Procfs | It can be used to obtain information about the system and to change certain kernel parameters at runtime using sysctl command. |
- Info from
- http://wiki.novell.com/index.php/File_System_Primer
pull from this page to my table
Dir Structure and Partitioning Best Practices
Following is descriptions of common unix dir’s and best practice partitioning of them
| Dir | Description | Mount options, best practice |
|---|---|---|
| / | Root partition; incorporates the files under several dirs including /dev, /sbin, /tmp etc | |
| /home | Users home directory | Set options local, nodev, nosuid, with quotas |
| /usr | Stores application programs; Linux/BSD binary programs are installed here | Set option nodev |
| /var | Stores log files, mails and other; files which keep changing size (log, or caching files) | Set option local, nodev, nosuid |
| /tmp | Stores temporary files | Set option nodev, nosuid, noexec option must be enabled |
Following is the code in /etc/fstab
/dev/sda1 /home ext3 defaults,nosuid,nodev 1 2
Following is the code from an example mount command. Just running mount, gives you currently mounted fs’s.
/dev/wd0a on / type ffs (local) /dev/wd1a on /home type ffs (local, nodev, nosuid, with quotas) /dev/wd0d on /root type ffs (local) /dev/wd0e on /usr type ffs (local, nodev) /dev/wd0f on /tmp type ffs (local, nodev) /dev/wd0h on /var type ffs (local, nodev, nosuid) /dev/wd0g on /var/log type ffs (local, nodev)
For more info please read man pages of fstab, mount, fdisk or http://www.cyberciti.biz/tips/the-importance-of-linux-partitions.html
fstab options key
- nosuid - Do not set SUID/SGID access on this partition
- nodev - Do not character or special devices on this partition
- noexec - Do not set execution of any binaries on this partition
- ro - Mount file system as readonly
- quota - Enable disk quota
Above options can be set only if you have separate partitions.
