I've been updating a remote Ubuntu 8.04 LTS server quite frequently, and ended up filling my /boot partition which is only ~240MB. It looks like there are about 11 different versions of kernel updates on that partition, and I want to remove all but the last few to free up space. My only concern is I want to make sure I do it right because this is a remote server and I *need* it to reboot successfully, heh. Is there a program which will automatically "clean up" the /boot partition, or can you suggest what exactly I can/can't remove (and files I should update, like /boot/grub/menu.lst)?

Code:
root@numberzero:~# ls -alhR /boot
/boot:
total 204M
drwxr-xr-x  4 root root 5.0K 2010-02-27 17:02 .
drwxr-xr-x 21 root root 4.0K 2010-02-27 17:00 ..
-rw-r--r--  1 root root 417K 2008-04-10 12:55 abi-2.6.24-16-server
-rw-r--r--  1 root root 417K 2008-05-01 14:03 abi-2.6.24-17-server
-rw-r--r--  1 root root 417K 2008-05-28 22:48 abi-2.6.24-18-server
-rw-r--r--  1 root root 417K 2008-08-21 00:50 abi-2.6.24-19-server
-rw-r--r--  1 root root 417K 2008-10-21 23:16 abi-2.6.24-21-server
-rw-r--r--  1 root root 417K 2008-11-24 17:52 abi-2.6.24-22-server
-rw-r--r--  1 root root 417K 2009-04-01 21:21 abi-2.6.24-23-server
-rw-r--r--  1 root root 417K 2009-09-18 16:23 abi-2.6.24-24-server
-rw-r--r--  1 root root 417K 2009-10-20 07:52 abi-2.6.24-25-server
-rw-r--r--  1 root root 417K 2009-12-01 17:59 abi-2.6.24-26-server
-rw-r--r--  1 root root 417K 2010-01-27 23:15 abi-2.6.24-27-server
-rw-r--r--  1 root root  79K 2008-04-10 12:55 config-2.6.24-16-server
-rw-r--r--  1 root root  79K 2008-05-01 14:03 config-2.6.24-17-server
-rw-r--r--  1 root root  79K 2008-05-28 22:48 config-2.6.24-18-server
-rw-r--r--  1 root root  79K 2008-08-21 00:50 config-2.6.24-19-server
-rw-r--r--  1 root root  79K 2008-10-21 23:16 config-2.6.24-21-server
-rw-r--r--  1 root root  79K 2008-11-24 17:52 config-2.6.24-22-server
-rw-r--r--  1 root root  79K 2009-04-01 21:21 config-2.6.24-23-server
-rw-r--r--  1 root root  79K 2009-09-18 16:23 config-2.6.24-24-server
-rw-r--r--  1 root root  79K 2009-10-20 07:52 config-2.6.24-25-server
-rw-r--r--  1 root root  79K 2009-12-01 17:59 config-2.6.24-26-server
-rw-r--r--  1 root root  79K 2010-01-27 23:15 config-2.6.24-27-server
drwxr-xr-x  2 root root 1.0K 2010-02-27 17:03 grub
-rw-r--r--  1 root root 7.6M 2008-05-08 04:25 initrd.img-2.6.24-16-server
-rw-r--r--  1 root root 7.4M 2008-05-08 04:17 initrd.img-2.6.24-16-server.bak
-rw-r--r--  1 root root 7.6M 2008-05-27 19:45 initrd.img-2.6.24-17-server
-rw-r--r--  1 root root 7.6M 2008-05-27 19:44 initrd.img-2.6.24-17-server.bak
-rw-r--r--  1 root root 7.7M 2008-06-09 23:40 initrd.img-2.6.24-18-server
-rw-r--r--  1 root root 7.6M 2008-06-03 18:08 initrd.img-2.6.24-18-server.bak
-rw-r--r--  1 root root 7.7M 2008-08-25 22:15 initrd.img-2.6.24-19-server
-rw-r--r--  1 root root 7.7M 2008-07-16 13:30 initrd.img-2.6.24-19-server.bak
-rw-r--r--  1 root root 7.7M 2008-11-13 11:42 initrd.img-2.6.24-21-server
-rw-r--r--  1 root root 7.7M 2008-10-16 15:56 initrd.img-2.6.24-21-server.bak
-rw-r--r--  1 root root 7.7M 2008-12-16 13:27 initrd.img-2.6.24-22-server
-rw-r--r--  1 root root 7.7M 2008-11-27 18:09 initrd.img-2.6.24-22-server.bak
-rw-r--r--  1 root root 7.7M 2009-04-23 14:27 initrd.img-2.6.24-23-server
-rw-r--r--  1 root root 7.7M 2009-04-23 14:26 initrd.img-2.6.24-23-server.bak
-rw-r--r--  1 root root 7.7M 2009-10-11 23:59 initrd.img-2.6.24-24-server
-rw-r--r--  1 root root 7.7M 2009-10-11 23:59 initrd.img-2.6.24-24-server.bak
-rw-r--r--  1 root root 7.7M 2009-11-08 20:32 initrd.img-2.6.24-25-server
-rw-r--r--  1 root root 7.7M 2009-11-08 20:32 initrd.img-2.6.24-25-server.bak
-rw-r--r--  1 root root 7.7M 2010-02-27 17:01 initrd.img-2.6.24-26-server
-rw-r--r--  1 root root 7.7M 2009-12-07 22:11 initrd.img-2.6.24-26-server.bak
-rw-r--r--  1 root root 7.7M 2010-02-27 17:02 initrd.img-2.6.24-27-server
-rw-r--r--  1 root root 7.7M 2010-02-27 17:00 initrd.img-2.6.24-27-server.bak
drwx------  2 root root  12K 2008-05-08 04:13 lost+found
-rw-r--r--  1 root root 101K 2007-09-28 06:06 memtest86+.bin
-rw-r--r--  1 root root 912K 2008-04-10 12:55 System.map-2.6.24-16-server
-rw-r--r--  1 root root 912K 2008-05-01 14:03 System.map-2.6.24-17-server
-rw-r--r--  1 root root 912K 2008-05-28 22:48 System.map-2.6.24-18-server
-rw-r--r--  1 root root 912K 2008-08-21 00:50 System.map-2.6.24-19-server
-rw-r--r--  1 root root 913K 2008-10-21 23:16 System.map-2.6.24-21-server
-rw-r--r--  1 root root 913K 2008-11-24 17:52 System.map-2.6.24-22-server
-rw-r--r--  1 root root 913K 2009-04-01 21:21 System.map-2.6.24-23-server
-rw-r--r--  1 root root 913K 2009-09-18 16:23 System.map-2.6.24-24-server
-rw-r--r--  1 root root 913K 2009-10-20 07:52 System.map-2.6.24-25-server
-rw-r--r--  1 root root 913K 2009-12-01 17:59 System.map-2.6.24-26-server
-rw-r--r--  1 root root 914K 2010-01-27 23:15 System.map-2.6.24-27-server
-rw-r--r--  1 root root 1.9M 2008-04-10 12:55 vmlinuz-2.6.24-16-server
-rw-r--r--  1 root root 1.9M 2008-05-01 14:03 vmlinuz-2.6.24-17-server
-rw-r--r--  1 root root 1.9M 2008-05-28 22:48 vmlinuz-2.6.24-18-server
-rw-r--r--  1 root root 1.9M 2008-08-21 00:50 vmlinuz-2.6.24-19-server
-rw-r--r--  1 root root 1.9M 2008-10-21 23:16 vmlinuz-2.6.24-21-server
-rw-r--r--  1 root root 1.9M 2008-11-24 17:52 vmlinuz-2.6.24-22-server
-rw-r--r--  1 root root 1.9M 2009-04-01 21:21 vmlinuz-2.6.24-23-server
-rw-r--r--  1 root root 1.9M 2009-09-18 16:23 vmlinuz-2.6.24-24-server
-rw-r--r--  1 root root 1.9M 2009-10-20 07:52 vmlinuz-2.6.24-25-server
-rw-r--r--  1 root root 1.9M 2009-12-01 17:59 vmlinuz-2.6.24-26-server
-rw-r--r--  1 root root 2.0M 2010-01-27 23:15 vmlinuz-2.6.24-27-server

/boot/grub:
total 186K
drwxr-xr-x 2 root root 1.0K 2010-02-27 17:03 .
drwxr-xr-x 4 root root 5.0K 2010-02-27 17:02 ..
-rw-r--r-- 1 root root  197 2008-05-08 04:25 default
-rw-r--r-- 1 root root   15 2008-05-08 04:25 device.map
-rw-r--r-- 1 root root 7.9K 2008-05-08 04:25 e2fs_stage1_5
-rw-r--r-- 1 root root 7.8K 2008-05-08 04:25 fat_stage1_5
-rw-r--r-- 1 root root   16 2008-05-08 04:25 installed-version
-rw-r--r-- 1 root root 8.5K 2008-05-08 04:25 jfs_stage1_5
-rw-r--r-- 1 root root 8.0K 2010-02-27 17:00 menu.lst
-rw-r--r-- 1 root root 7.6K 2010-02-27 17:00 menu.lst~
-rw-r--r-- 1 root root 7.2K 2008-05-08 04:25 minix_stage1_5
-rw-r--r-- 1 root root 9.5K 2008-05-08 04:25 reiserfs_stage1_5
-rw-r--r-- 1 root root  512 2008-05-08 04:25 stage1
-rw-r--r-- 1 root root 106K 2008-05-08 04:25 stage2
-rw-r--r-- 1 root root 9.1K 2008-05-08 04:25 xfs_stage1_5

/boot/lost+found:
total 17K
drwx------ 2 root root  12K 2008-05-08 04:13 .
drwxr-xr-x 4 root root 5.0K 2010-02-27 17:02 ..