At 10:38 AM 12/22/2004 -0500, Eve Atley wrote:
I ran the df command on Redhat Linux 9, and came up with this...what exactly does it mean? Do I have space to backup part of this machine to another drive? Which is my main drive?
Filesystem 1K-blocks Used Available Use% Mounted on /dev/hda2 37334192 5058672 30379048 15% / /dev/hda1 101089 29129 66741 31% /boot /dev/hdb1 57669728 38728096 16012184 71% /home none 257160 0 257160 0% /dev/shm
First, you figure out which drive is which by checking the rightmost column, mount point. If by "main drive" you mean the root filesystem, it is the filesystem (or partition; not "drive") mounted at "/" ... in your case, /dev/hda2. This is a partition on drive /dev/hda, which by convention is the IDE Primary Master drive. (If you meant something different by "main drive" ... for example, the biggest drive ... please try asking again, more clearly.)
The secret decoder ring for IDE drive identifiers, BTW, is
/dev/hda = Primary Master
/dev/hdb = Primary Slave
/dev/hdc = Secondary Master
/dev/hdd = Secondary SlaveThe second column "1K-blocks") tells you how big each drive is in KB, and the fourth column ("Available") tells you how much space is available to ordinary users (the portion reserved for root, usually 5%, is not included in this number).
So, what we see above is ...
the root (/) filesystem is on /dev/hda2, is 37 GB in size, and has 30 GB available
the /boot partition (holds your kernel and a few related files) is on /dev/hda1, is tiny by today's standards (100 MB), and has 67 MB free.
the /home partition is on /dev/hdb1 (a partition on the IDE Primary Slave drive), is 57 GB in size, and has 16 GB available.
Can you do any backups on this machine? Well ...
the root (/) filesystem is about 5 GB in size, and /home has 16 GB available, so you *could* back / up to /home (though you will need to use the "one drive" cp switch, so the modified script doesn't try to backup /home to itself).
the /boot filesystem is tiny enough to backup anywhere you like, but it is statis so not usually worth backing up.
the /home filesystem is 38 GB, larger than the 30 GB available on /, so you cannot back it up on this system (unless you do it using tar with compression, in which case you might be able to).
The script you have below is written to do backups over a netwotk to another machine, via SMB (samba) mounts. Adapting it to same-machine backups is, I'd suspect, more trouble than it is worth.
The backup script we have set up is as follows...I'd like to change the path to instead backup to where I may have space...not the backup machine which does NOT have enough space.
#!/bin/sh #backup_main: simple backup routine to be used with samba and bash cp. #this one simply copies an entire directory recursively to an smb mount. # #written by RKL - 7/17/2003 mount -t smbfs -o username=username,password=password,workgroup=somewkgrp //BACKUP/backup /mnt/backup &>/root/backup_scripts/logs/`date +"MOUNT-%y-%m-%d.log"` if [ -f /mnt/backup/connected ]; then rm -rf /mnt/backup/`date +"%A/"` mkdir /mnt/backup/`date +"%A/"` cp -r /home/shared/* /mnt/backup/`date +"%A/"` 1>/mnt/backup/logs/`date +"DAILY-%y-%m-%d.log"` 2>/mnt/backup/logs/`date +"DAILY-%y-%m-%d.err"` umount /mnt/backup &>/root/backup_scripts/logs/`date +"MOUNT-%y-%m-%d.log"` fi
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