How to cleanyour package cache with paccache -Arch linux

You will want to clean up your package cache from obsolete packages from time to time.
Be sure to have installed
# pacman -S  pacman-contrib
 When this is done:
# paccache -rk 2
to keep the latest after uodating and your previous package.

Umlaut

First set the right alt key  {AltGr} to compose

setxkbmap -layout us -option caps:ctrl_modifier,compose:ralt,terminate:ctrl_alt_bksp

Now to type umlaut:

    press the Alt Gr button

    release it

    then type in u

    followed by "

    which gives you a ü

When you're login is borked

Using lxdm as login manager for entering an openbox desktop environment, I was rather surprised I suddenly experienced a halt halfway starting up.
This was years ago something like that happened.
First I checked if the hard drive by entering another installation on that particular hard drive; that was OK so HD was not damaged.

Another boot into Archbang led to the same failure to get to see lxdm doing, what it is suppose to do.

Using ctl+alt+f2 I was able to start another terminal session, tty2.
Loging  in as user and giving password  I was able to start openbox by using:
startx

I couldn't discover what was wrong with lxdm and decided to check .xinitrc in /user/home/
Was OK with rule

exec openbox-session

Now checking ~/.bash_profile 

making sure following rule was active:

[[ -z $DISPLAY && $XDG_VTNR -eq 1 ]] && exec startx 

As alternative to lxdm I decided to choose to autologin using systemd

Commands:

cp /usr/lib/systemd/system/getty@.service /etc/systemd/system/autologin@.service

Symbolic linking:

ln -s /etc/systemd/system/autologin@.service /etc/systemd/system/getty.target.wants/getty@tty1.service

If the link is already active you can edit getty@tty1.service in /etc/systemd/system/getty.target.wants

by changing

ExecStart=-/sbin/agetty -o '-p -- \\u' --noclear %I $TERM

to in my case

ExecStart=-/sbin/agetty -a paul %I 38400

Reload daemon:

systemctl daemon-reload

And restart service:
systemctl start getty@tty1.service

howto use setup.py file

sudo ./setup.py install

Mp3cut in Linux Arch

Install from Aur
$yaourt -S mp3cut

I downloaded a radioconcert from which I wanted to save a part from 8 minutes 49 seconds to 1 hour 11 minutes 42 seconds
Open terminal in the folder in which the file you want to cut (concert.mp3).
$mp3cut -t 00:08:49-01:11:42 concert.mp3
The output will be written as concert.out.mp3

Update issue Arch kfilemetadata4 libbaloo4

looking for conflicting packages...
:: poppler and poppler-qt4 are in conflict. Remove poppler-qt4? [y/N] y
error: failed to prepare transaction (could not satisfy dependencies)
:: kfilemetadata4: removing poppler-qt4 breaks dependency 'poppler-qt'

Solution:

#pacman -R kfilemetadata4  libbaloo4

list folder content by only directory names using the terminal

$ ls -d */

is the command that you need in the terminal that is opened in a certain folder to list only the sub-directory names and not the sub-directories content.

I use it for instance to make a text file to list music and ebook folders I have.