Difference between revisions of "Server Administration"

Revision as of 12:15, 24 May 2013

Updating the server

Install yumex (YUM eXtender GUI for yum)

sudo yum install yumex

Install new hard drive

After plugging in new hard drive, find the drive by typing

ll /dev/sd*

The new drive show show up here in this list. In this case, it is /dev/sdc

fdisk /dev/sdc

Using fdisk, create a new Linux partition containing the entire hard drive. fdisk command m (for help), n (to add a new partition) and w (to write table to disk and exit). Defaults are recommended for the partition (one primary partition).

mkfs.ext3 -m 0 /dev/sdc1

Format this new partition as ext3. By default, this reserves 5% of the disk for root. To remove this reservation, with use "-m 0". This can be changed later with "tune2fs -m 0 /dev/sdc1". Alternatively, one can use mkfs.ext4 instead of mkfs.ext3 to format the partition as ext4 which is backward compatible with ext3. Now create a new mount point in /media..

mkdir /media/new_drive

Edit /etc/fstab to add the new drive, such as the line

/dev/sdc1 /media/new_drive ext3 defaults,user,rw 0 0 

Now mount the new partition using

mount /media/new_drive

Use df to make sure the new drive is up and you have the right amount of free space

Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              99M   87M  7.5M  93% /boot
/dev/sdb1             459G  232G  204G  54% /media/sdb1
/dev/sdc1             917G  109M  871G   1% /media/hdock

In case you are having trouble unmounting a volume, use lazy unmount -l. This does not force an unmount, rather it waits until the device stops being busy.

umount -l hdock/