#mke2fs

[peeterjoot]

Introducing a fixed capacity directory (Linux).

Introducing a fixed capacity directory (Linux).

I have a dump directory that is too easily filled up (with cores and dumps) if a programming error makes our system misbehave catastrophically. Here’s a nice trick to create a small filesystem with fixed capacity so that the owning filesystem (in my case /var) can’t be filled up: dd if=/dev/zero of=dump.loopback bs=1M count=10 mke2fs ./dump.loopback mount -o loop dump.loopback ./dump chmod 777…

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[angrynerd]

Disk partitioning, formatting, and mounting

Here's how to add a new disk to a Linux machine:

# fdisk /dev/xvdb ... Command (m for help): p ... Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-181975, default 1): Using default value 1 Last cylinder or +size or +sizeM or +sizeK (1-181975, default 181975): Using default value 181975 Command (m for help): p Disk /dev/xvdb: 1496.7 GB, 1496796102656 bytes 255 heads, 63 sectors/track, 181975 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xc6318a63 Device Boot Start End Blocks Id System /dev/xvdb1 1 181975 1461714156 83 Linux Command (m for help): w ... # mke2fs -j /dev/xvdb1 # mkdir /mydisk # echo "/dev/xvdb1 /mydisk ext3 defaults 1 2" >> /etc/fstab # mount -a # df -H

Sources: schirmacher.de and cyberciti.biz