MARVIN
ODIN
TERMINAL
lvm
ext3
tricks
LVM
vgcreate -v pig /dev/hda3 /dev/hdc1 /dev/hdd1 lvcreate -L1T -npig pig mkfs.ext3 /dev/pig/pig tune2fs -c0 -i0 -r0 /dev/pig/pig |
ext3
This is a quick list for creating an ext3 filesystem.For barrier=1 a kernel 2.6.17 or newer is needed.
After the usual fdisk stuff we do this:
mkfs.ext2 -J /dev/hda1 tune2fs -c0 -i0 -O DIR_INDEX /dev/hda1 |
And this line is for our fstab:
/dev/hda1 / ext3,ext2 defaults,barrier=1 1 1 |
If you have already an ext3 and want to add directory indexing
for more speed you have to do this:
tune2fs -o DIR_INDEX /dev/hda1 umount /dev/hda1 || mount -o remount,ro /dev/hda1 fsck -fD /dev/hda1 |
after mounting with barrier=1 check your logs.
If it doesn't work use hdparm to disable caching of your harddrive.
Tricks
backup a partition over network:
dd if=/dev/sda1 | gzip | ssh user@remote dd of=sda1_backup.gz dd if=sda1_backup.gz | gzip -d | ssh user@remote dd of=/dev/sda1 |
replace blanks in filenames with _:
for i in *; do mv "${i}" `echo ${i} | sed 's/ /_/g'`; done
|
fineprint some textfiles as postscript:
a2ps -1RE -s2 testfile.pl testfile.txt |
creating a slackware-package:
tar -xzf source.tar.gz cd source ./configure make make install DESTDIR=/root/build cd /root/build makepkg source-1.5-i386-1.tgz installpkg source-1.5-i386-1.tgz |
useful bootoptions:
Linux single Linux panic=60 4 Linux root=/dev/hdc3 Linux hda=3649,255,63 hdd=cdrom hda 30gb LBA mode man bootparam |
recovering partition table:
gpart -b FILENAME -W /dev/hda /dev/hda |
e2fsck /dev/hda1 e2fsck: Attemp to read block from filesystem resulted in short read e2fsck -b 32768 /dev/hda1 alternate superblocks are stored typical in 8193, 16384, 32768 |
cloning a bad disk:
dd if=/dev/hda of=/dev/hdb conv=noerror,sync gnu.orgs ddrescue: ddrescue --max-retries=-1 /dev/hda /dev/hdb |