Arch on tech.notes

How to add a swap drive to your system

Wed, 02 Oct 2019 08:04:57 +0000

How to add a swap drive to your system, in this case I did this for a virtual machine (qemu) running Arch Linux.

See at the bottom for information about the virtual drive for qemu.

List current available to system disks:

sudo blkid

List all disks:

sudo lsblk

Format as swap:

sudo mkswap /dev/vdb

gives back the UUID

Now the new swap disk will be shown when executing this again:

sudo blkid

(also give the UUID)

rename

Mon, 29 Apr 2019 20:06:29 +0000

… is an easy to use and powerful tool, it can be used to replace part of file name (string1) with some other string. Something one can also do with some “sed” hack, but this tool is much easier to use, especially for beginners.

You can get all information needed from “rename –help” (here from Linux Mint):

rename --help
Usage:
    rename [ -h|-m|-V ] [ -v ] [ -n ] [ -f ] [ -e|-E perlexpr]*|perlexpr
    [ files ]

Options:
    -v, -verbose
            Verbose: print names of files successfully renamed.

    -n, -nono
            No action: print names of files to be renamed, but don't rename.

    -f, -force
            Over write: allow existing files to be over-written.

    -h, -help
            Help: print SYNOPSIS and OPTIONS.

    -m, -man
            Manual: print manual page.

    -V, -version
            Version: show version number.

    -e      Expression: code to act on files name.

            May be repeated to build up code (like "perl -e"). If no -e, the
            first argument is used as code.

    -E      Statement: code to act on files name, as -e but terminated by
            ';'.

I did use this tool rename some files that contained the string “www”, which I had to replace with “web”, lets say there were files named like this: