Major features

Table A-1 lists side-by-side comparisons of major features of AIX and Linux.

Table A-1. Major features

Feature	AIX	Linux
Logical Volume Manager	LVM (can only increase file system size on the fly)	LVM (can increase and also decrease file systems on the fly)
JFS	JFS, JFS2	JFS, ext2 and ext3 (Red Hat), Reiserfs (SuSE)
Admin interface	Smit, Smitty, WebSM	Webmin (Openware) redhat-config (Red Hat) YasT2 (SuSE)
Boot options	SMS menus (Press 1 or F1), Service Processor menus (Press 1 @beep)	SMS menus (Press 1 or F1), Open Firmware menus (Press 8 or F8)
Hardware monitoring	Inventory Scout, diagnostics, error logger	/var/adm/messages, Custom scripts
Clustering	HACMP	Cluster Suite (Red Hat) Heartbeat (SuSE)
Recovering root access	boot from CD/network to maintenance mode	Boot from CD/network to "Rescue" mode
Network install	Network Install Manager (NIM)	Cluster Systems Management (CSM) Kickstart (Red Hat) AutoYaST (SuSE)
Image backups	mksysb,sysback	Storix (third party)
File system backups	smitty lvm, TSM, sysback
Default shell	ksh	bash
Run levels	0-1 (Reserved) 2 (Multiuser-default) 3-9 ( User preferences) S,s,m,M (Maintenance mode)	0 (Halt) 1 (Single user mode) 2 (Multiuser-no NFS) 3 (Multiuser-with NFS-default) 4 Unused) 5 (default with X11, xdm) 6 (Reboot)
Default window manager	CDE	GNOME,KDE