What if you created a volume group in LVM and no longer need it? Well, to properly clean everything up follow the steps below.
First, let’s identify the target. In this case, I made a temporary /u2 partition, that I now no longer need:
# df -h /u2
Filesystem [...]
I use this to attach reports (pdfs, etc) to emails in my scripts. Small Perl snippet:
system(“/usr/bin/mutt -i $file_with_body_content -a $file_to_attach -s \”Some Random Report $report_date\” $mailto < /dev/null”);
And since this has now bitten me twice, make sure that there are no variables with carriage returns at the end. In my case, both times [...]
For use with EMC (Legato) Networker…
Move everything off of a specific volume onto another pool (Careful, does not take into account possible clones – add /cloneid somehow to the end. I haven’t been able to automate that yet):
# for i in `/usr/sbin/mminfo -q “volume=OLDVOLUME” -r “ssid”`; do /usr/sbin/nsrstage -v -b NEWPOOL -s NETWORKERSERVERNAME -m [...]
Convert plain text to passwd crypt:
#!/usr/bin/perl
print “Enter the password you would like to use: “;
$pass1 = <STDIN>;
if ($pass1) {
my $salt =
join(”, (‘.’, ‘/’, 0..9, ‘A’..’Z', ‘a’..’z')[rand 64, rand 64]);
my $cryptpw = crypt($pass1, $salt);
print “The encrypted password suitable for passwd is $cryptpw\n”;
}
Convert base64 encoded to plain text:
#!/usr/bin/perl
use MIME::Base64;
print “Enter the encoded data: [...]
Previously I posted how to add a hard drive and create a new volume in LVM. This time we’ll add a new hard drive and then increase or extend the size of an existing volume or partition. This is an example using an RHEL 5 derivative, OEL 5. The server is really [...]