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Verifying the Installation28
HP restricted
NOTE: Make sure you prefix the file name with ‘.’ when you back it up to tape. If you do not, the
restore operation in step 3 will overwrite the original copy on disk.
3. Read the file back from tape:
% cd /tmp
% tar xvf <device file>
The ‘x’ option to tar here means “extract from the archive”.
Use the same value for the <device file> argument as in step 2.
4. Compare the original with this retrieved file:
% cmp <original file> /tmp/<retrieved file>
This compares the files byte by byte. If they are the same, there should be no output, and this
verifies that the installation is correct. The arguments are:
Example
Suppose you are verifying the installation of an HP Ultrium tape drive on an HP-UX 11.X system. The
procedure would be as follows.:
1. Change directory to root:
% cd /
2. Back up /stand/vmunix to tape:
% tar cvf /dev/rmt/0m ./stand/vmunix
Note the prefix of ‘.’ to the filename.
3. Change to the temporary directory:
% cd /tmp
4. Extract the file from the tape:
% tar xvf /dev/rmt/0m
5. Compare the original with the restored version:
% cmp /stand/vmunix /tmp/stand/vmunix
Note that the original filename is not prefixed with ‘.’.
<original file> The name of the original file, prefixed with ‘/’.
Example: /stand/vmunix
<retrieved file> The name of the file retrieved from the archive.
Example: stand/vmunix