Suppose you have three hosts (host.one.domain.name, host.two.domain.name host.three.domain.name) with the same credentials, with access by ssh key, then any time when you need to connect to host you must type something like this:

ssh user@host.one.domain.name -i path/to/key_file

^
ssh user@host.one.domain.name -i path/to/key_file

You can simplify your life by creating file ~/.ssh/config, with content:

Host one two three
  HostName host.%h.domain.name
  User user
  IdentityFile path/to/key_file

And now ...

Download build agent archive from your TeamCity server:

wget http://your_teamcity.server.com:8111/update/buildAgent.zip

Unzip it in separate directory:

mkdir buildAgent

^
mv buildAgent.zip buildAgent
^
cd buildAgent
^
unzip buildAgent.zip
^
chown -R your_user:your_group ../buildAgent

Copy agent's settings file:

cp conf/buildAgent.dist.properties conf/buildAgent.properties

Edit this file:

nano conf/buildAgent.properties

There are fields which you must update:

# your TeamCity server address:

...

If you want to ignore subfolder in git tree you may add this folder in .gitignore file in root directory, or just create .gitignore file in that folder with content:

# Ignore everything in this directory
*
# Except this file
!.gitignore

This card is the copycat from this awesome article, all thanks to Zsolt Agoston.

# Extract the private key
openssl pkcs12 -in wild.pfx -nocerts -nodes -out priv.cer
 
# Extract the public key
openssl pkcs12 -in wild.pfx -clcerts -nokeys -out pub.cer
 
# Extract the CA cert chain
openssl pkcs12 -in wild.pfx -cacerts -nokeys -chain -out ca.cer

sudo pacman-mirrors -f5 # to update mirror list
sudo pacman -Syyu # system upgrade

Or oneliner

sudo pacman-mirrors -f5 && sudo pacman -Syyu

If you getting messages like this: perl: warning: Setting locale failed. in your console, then you must configure your locales. First run:

locale

You will see something like this:

LANG=C
LANGUAGE=
LC_CTYPE=fi_FI.UTF-8
LC_NUMERIC="C"
LC_TIME="C"
LC_COLLATE=fi_FI.UTF-8
LC_MONETARY="C"
LC_MESSAGES=fi_FI.UTF-8
LC_PAPER="C"
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT="C"
LC_IDENTIFICATION="C"
LC_ALL=

Then generate the missing locale and reconfigure locales...