容量の変更
DebianのSDイメージをmicroSDに書き込んだ直後ではパーティションがぎちぎちでapt-get updateも通らない。
パーティションサイズを増やす必要がある。
ここを参照して作業。
ただし、Debian (BeagleBone, BeagleBone Black - 2GB SD) 2014-05-14を使った場合は、resize2fsは最初から入っているのでインストールする必要なし。
（というか容量の余裕がなくて、#apt-get install system-config-lvmができない）
root@beaglebone:~# df -hリブート後、resize2fsを実行
Filesystem Size Used Avail Use% Mounted on
rootfs 1.6G 1.5G 0 100% /
udev 10M 0 10M 0% /dev
tmpfs 100M 504K 99M 1% /run
/dev/mmcblk0p2 1.6G 1.5G 0 100% /
tmpfs 249M 0 249M 0% /dev/shm
tmpfs 249M 0 249M 0% /sys/fs/cgroup
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 100M 0 100M 0% /run/user
/dev/mmcblk0p1 96M 70M 27M 73% /boot/uboot
root@beaglebone:~# fdisk /dev/mmcblk0
Command (m for help): p
Disk /dev/mmcblk0: 15.7 GB, 15720251392 bytes
4 heads, 16 sectors/track, 479744 cylinders, total 30703616 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 * 2048 198655 98304 e W95 FAT16 (LBA)
/dev/mmcblk0p2 198656 3481599 1641472 83 Linux
Command (m for help): q
root@beaglebone:~# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 1.6G 1.5G 0 100% /
udev 10M 0 10M 0% /dev
tmpfs 100M 504K 99M 1% /run
/dev/mmcblk0p2 1.6G 1.5G 0 100% /
tmpfs 249M 0 249M 0% /dev/shm
tmpfs 249M 0 249M 0% /sys/fs/cgroup
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 100M 0 100M 0% /run/user
/dev/mmcblk0p1 96M 70M 27M 73% /boot/uboot
root@beaglebone:~# fdisk /dev/mmcblk0
Command (m for help): p
Disk /dev/mmcblk0: 15.7 GB, 15720251392 bytes
4 heads, 16 sectors/track, 479744 cylinders, total 30703616 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 * 2048 198655 98304 e W95 FAT16 (LBA)
/dev/mmcblk0p2 198656 3481599 1641472 83 Linux
Command (m for help): d
Partition number (1-4): 2
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (1-4, default 2): 2
First sector (198656-30703615, default 198656):
Using default value 198656
Last sector, +sectors or +size{K,M,G} (198656-30703615, default 30703615):
Using default value 30703615
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
root@beaglebone:~# sudo reboot
Broadcast message from root@beaglebone (pts/0) (Thu May 15 02:32:38 2014):
The system is going down for reboot NOW!
root@beaglebone:~#
root@beaglebone:~# sudo resize2fs /dev/mmcblk0p2
