Насколько я понимаю, работа libvirt зависит от питона - и остановка/удаление питона приведет к остановке виртуальным машин, что очень критично.
sa@mr-data:~$ sudo du -ah /boot/ | more
2,8M /boot/System.map-3.2.0-33-generic
2,8M /boot/System.map-3.2.0-27-generic
138K /boot/config-3.2.0-31-generic
173K /boot/memtest86+.bin
2,8M /boot/System.map-3.2.0-31-generic
15M /boot/initrd.img-3.2.0-31-generic
15M /boot/initrd.img-3.2.0-29-generic
138K /boot/config-3.2.0-32-generic
4,8M /boot/vmlinuz-3.2.0-29-generic
4,8M /boot/vmlinuz-3.2.0-31-generic
773K /boot/abi-3.2.0-27-generic
15M /boot/initrd.img-3.2.0-27-generic
7,0K /boot/grub/xfs.mod
7,0K /boot/grub/raid.mod
4,0K /boot/grub/gcry_crc.mod
3,0K /boot/grub/cpio.mod
33K /boot/grub/gfxmenu.mod
4,0K /boot/grub/hexdump.mod
3,0K /boot/grub/echo.mod
6,0K /boot/grub/hfs.mod
5,0K /boot/grub/befs.mod
1,0K /boot/grub/fs.lst
3,0K /boot/grub/testload.mod
4,0K /boot/grub/minix2.mod
2,0K /boot/grub/test_blockarg.mod
3,0K /boot/grub/keystatus.mod
3,0K /boot/grub/search_fs_uuid.mod
5,0K /boot/grub/at_keyboard.mod
4,0K /boot/grub/moddep.lst
2,0K /boot/grub/part_acorn.mod
3,0K /boot/grub/command.lst
15K /boot/grub/xzio.mod
5,0K /boot/grub/afs.mod
4,0K /boot/grub/gcry_sha256.mod
11K /boot/grub/acpi.mod
2,0K /boot/grub/xnu_uuid.mod
3,0K /boot/grub/search.mod
3,0K /boot/grub/msdospart.mod
3,0K /boot/grub/tar.mod
29K /boot/grub/core.img
7,0K /boot/grub/udf.mod
19K /boot/grub/gcry_rijndael.mod
6,0K /boot/grub/uhci.mod
5,0K /boot/grub/elf.mod
105K /boot/grub/normal.mod
6,0K /boot/grub/video_bochs.mod
3,0K /boot/grub/usbserial_pl2303.mod
25K /boot/grub/gcry_whirlpool.mod
3,0K /boot/grub/raid6rec.mod
11K /boot/grub/ohci.mod
4,0K /boot/grub/minicmd.mod
5,0K /boot/grub/vga.mod
9,0K /boot/grub/gzio.mod
10K /boot/grub/grldr.img
3,0K /boot/grub/fshelp.mod
7,0K /boot/grub/iso9660.mod
31K /boot/grub/xnu.mod
11K /boot/grub/efiemu64.o
3,0K /boot/grub/part_apple.mod
3,0K /boot/grub/memdisk.mod
2,0K /boot/grub/read.mod
9,0K /boot/grub/lzopio.mod
4,0K /boot/grub/terminal.mod
5,0K /boot/grub/ufs1.mod
4,0K /boot/grub/ntfscomp.mod
3,0K /boot/grub/search_label.mod
3,0K /boot/grub/usbserial_ftdi.mod
1,0K /boot/grub/partmap.lst
1,0K /boot/grub/lnxboot.img
3,0K /boot/grub/ntldr.mod
7,0K /boot/grub/jfs.mod
28K /boot/grub/legacycfg.mod
2,0K /boot/grub/part_sunpc.mod
2,0K /boot/grub/pbkdf2.mod
2,0K /boot/grub/cpuid.mod
1,0K /boot/grub/crypto.lst
1,0K /boot/grub/terminal.lst
39K /boot/grub/hwmatch.mod
30K /boot/grub/kernel.img
12K /boot/grub/gfxterm.mod
9,0K /boot/grub/gcry_rmd160.mod
5,0K /boot/grub/crypto.mod
2,0K /boot/grub/pci.mod
3,0K /boot/grub/sleep.mod
8,0K /boot/grub/ata.mod
3,0K /boot/grub/memrw.mod
4,0K /boot/grub/sfs.mod
2,0K /boot/grub/raid5rec.mod
24K /boot/grub/efiemu.mod
3,0K /boot/grub/loopback.mod
2,0K /boot/grub/lsmmap.mod
1,0K /boot/grub/diskboot.img
33K /boot/grub/zfs.mod
5,0K /boot/grub/befs_be.mod
1,0K /boot/grub/setjmp.mod
5,0K /boot/grub/test.mod
4,0K /boot/grub/scsi.mod
2,0K /boot/grub/mdraid09.mod
3,0K /boot/grub/mdraid1x.mod
1,0K /boot/grub/gfxblacklist.txt
2,0K /boot/grub/datetime.mod
39K /boot/grub/gcry_twofish.mod
13K /boot/grub/multiboot.mod
11K /boot/grub/terminfo.mod
3,0K /boot/grub/password_pbkdf2.mod
3,0K /boot/grub/part_bsd.mod
7,0K /boot/grub/serial.mod
7,0K /boot/grub/zfsinfo.mod
9,0K /boot/grub/gcry_sha1.mod
6,0K /boot/grub/setpci.mod
2,0K /boot/grub/gcry_arcfour.mod
18K /boot/grub/gcry_cast5.mod
1,0K /boot/grub/boot.img
6,0K /boot/grub/jpeg.mod
4,0K /boot/grub/videoinfo.mod
5,0K /boot/grub/lspci.mod
41K /boot/grub/regexp.mod
6,0K /boot/grub/linux16.mod
10K /boot/grub/linux.mod
5,0K /boot/grub/usb_keyboard.mod
28K /boot/grub/bsd.mod
4,0K /boot/grub/gptsync.mod
3,0K /boot/grub/vga_text.mod
3,0K /boot/grub/bitmap.mod
10K /boot/grub/mmap.mod
7,0K /boot/grub/nilfs2.mod
10K /boot/grub/reiserfs.mod
4,0K /boot/grub/lsacpi.mod
4,0K /boot/grub/gcry_md5.mod
3,0K /boot/grub/iorw.mod
5,0K /boot/grub/cs5536.mod
3,0K /boot/grub/password.mod
2,0K /boot/grub/example_functional_test.mod
8,0K /boot/grub/sendkey.mod
9,0K /boot/grub/gcry_blowfish.mod
3,0K /boot/grub/probe.mod
13K /boot/grub/multiboot2.mod
19K /boot/grub/video_fb.mod
3,0K /boot/grub/play.mod
2,0K /boot/grub/true.mod
3,0K /boot/grub/cat.mod
8,0K /boot/grub/efiemu32.o
12K /boot/grub/gcry_tiger.mod
6,0K /boot/grub/usbms.mod
34K /boot/grub/gcry_camellia.mod
1,0K /boot/grub/pxeboot.img
2,0K /boot/grub/hello.mod
2,0K /boot/grub/datehook.mod
4,0K /boot/grub/squash4.mod
5,0K /boot/grub/afs_be.mod
2,5M /boot/grub/unicode.pf2
11K /boot/grub/video.mod
8,0K /boot/grub/lvm.mod
3,0K /boot/grub/tga.mod
58K /boot/grub/locale/ru.mo
1,0K /boot/grub/locale/en_AU.mo
2,0K /boot/grub/locale/en_GB.mo
1,0K /boot/grub/locale/en_CA.mo
63K /boot/grub/locale
6,0K /boot/grub/video_cirrus.mod
4,0K /boot/grub/gcry_md4.mod
5,0K /boot/grub/extcmd.mod
3,0K /boot/grub/help.mod
2,0K /boot/grub/bufio.mod
9,0K /boot/grub/vbe.mod
3,0K /boot/grub/boot.mod
4,0K /boot/grub/usbtest.mod
3,0K /boot/grub/chain.mod
3,0K /boot/grub/ata_pthru.mod
2,0K /boot/grub/pxecmd.mod
5,0K /boot/grub/biosdisk.mod
2,0K /boot/grub/trig.mod
3,0K /boot/grub/date.mod
2,0K /boot/grub/dm_nv.mod
1,0K /boot/grub/g2hdr.img
6,0K /boot/grub/gcry_sha512.mod
1,0K /boot/grub/grubenv
3,0K /boot/grub/part_msdos.mod
6,0K /boot/grub/drivemap.mod
5,0K /boot/grub/videotest.mod
2,0K /boot/grub/part_amiga.mod
6,0K /boot/grub/hashsum.mod
3,0K /boot/grub/search_fs_file.mod
2,0K /boot/grub/reboot.mod
2,0K /boot/grub/part_sun.mod
14K /boot/grub/btrfs.mod
3,0K /boot/grub/blocklist.mod
4,0K /boot/grub/halt.mod
2,0K /boot/grub/aout.mod
10K /boot/grub/ntfs.mod
4,0K /boot/grub/bitmap_scale.mod
5,0K /boot/grub/affs.mod
5,0K /boot/grub/keylayouts.mod
6,0K /boot/grub/ext2.mod
5,0K /boot/grub/ls.mod
2,0K /boot/grub/adler32.mod
3,0K /boot/grub/configfile.mod
4,0K /boot/grub/minix.mod
6,0K /boot/grub/fat.mod
3,0K /boot/grub/lsapm.mod
8,0K /boot/grub/915resolution.mod
7,0K /boot/grub/png.mod
3,0K /boot/grub/functional_test.mod
3,0K /boot/grub/gcry_rfc2268.mod
18K /boot/grub/gcry_serpent.mod
17K /boot/grub/gcry_seed.mod
5,0K /boot/grub/parttool.mod
8,0K /boot/grub/hdparm.mod
5,0K /boot/grub/ufs2.mod
1,0K /boot/grub/video.lst
15K /boot/grub/relocator.mod
9,0K /boot/grub/grub.cfg
2,0K /boot/grub/cmostest.mod
12K /boot/grub/font.mod
2,0K /boot/grub/usbserial_common.mod
7,0K /boot/grub/pxe.mod
1,0K /boot/grub/parttool.lst
3,0K /boot/grub/part_gpt.mod
3,0K /boot/grub/cmp.mod
6,0K /boot/grub/hfsplus.mod
4,0K /boot/grub/gettext.mod
1,0K /boot/grub/cdboot.img
6,0K /boot/grub/loadenv.mod
10K /boot/grub/usb.mod
19K /boot/grub/gcry_des.mod
4,0M /boot/grub
175K /boot/memtest86+_multiboot.bin
2,8M /boot/System.map-3.2.0-29-generic
774K /boot/abi-3.2.0-33-generic
15M /boot/initrd.img-3.2.0-32-generic
12K /boot/lost+found
773K /boot/abi-3.2.0-29-generic
4,8M /boot/vmlinuz-3.2.0-33-generic
774K /boot/abi-3.2.0-32-generic
773K /boot/abi-3.2.0-31-generic
138K /boot/config-3.2.0-29-generic
138K /boot/config-3.2.0-33-generic
4,8M /boot/vmlinuz-3.2.0-27-generic
2,8M /boot/System.map-3.2.0-32-generic
138K /boot/config-3.2.0-27-generic
4,8M /boot/vmlinuz-3.2.0-32-generic
105M /boot/