ServerBuddies Support Blog

Using CLI Commands LVM

When sizes are required in a command line argument, units can always be specified explicitly. If you do not specify a unit, then a default is assumed, usually KB or MB. LVM CLI commands do not accept fractions.

When specifying units in a command line argument, LVM is case-insensitive; specifying M or m is equivalent, for example, and powers of 2 (multiples of 1024) are used. However, when specifying the –units argument in a command, lower-case indicates that units are in multiples of 1024 while upper-case indicates that units are in multiples of 1000.

All LVM commands accept a -v argument, which can be entered multiple times to increase the output verbosity. For example, the following examples shows the default output of the lvcreate command.

ClamAV quick commands

Update antivirus database:

Scan a directory and print out infected files:

Scan a directly and remove infected files and emails:

Commands to mirrors EZ templates for Parallels Virtuozzo containers

This command mirrors EZ templates for Parallels Virtuozzo containers for RPM-based repositories.

These commands create links that the installer uses to install EZ templates on DEB-based OSes.

If you plan not to mirror EZ templates or you serve RPM-based OSes, omit this step.

Useful SMART Commands

Cpanel script is not very helpful, but you can certainly use these commands for predict and analyze real drive issues:

smartctl -t short /dev/sdb This runs a short test on the drive, you then view the results with the above commands.

Note: you can even just schedule these to run as a cron job and pipe the output to | mail you@youremail.com to automate this.

There are also various scripts you can customize for smartd and smartctl, these scripts are usually in:
There are example scripts included with smartmontools. These are usually located in a location like:

There are several general features of all LVM CLI commands.

When sizes are required in a command line argument, units can always be specified explicitly. If you do not specify a unit, then a default is assumed, usually KB or MB. LVM CLI commands do not accept fractions.

Where commands take volume group or logical volume names as arguments, the full path name is optional. A logical volume called lvol0 in a volume group called vg0 can be specified as vg0/lvol0. Where a list of volume groups is required but is left empty, a list of all volume groups will be substituted. Where a list of logical volumes is required but a volume group is given, a list of all the logical volumes in that volume group will be substituted. For example, the lvdisplay vg0 command will display all the logical volumes in volume group vg0.

All LVM commands accept a -v argument, which can be entered multiple times to increase the output verbosity. For example, the following examples shows the default output of the lvcreate command.

The following command shows the output of the lvcreate command with the -v argument.

All LVM objects are referenced internally by a UUID, which is assigned when you create the object.