Ubuntu tips

• install VBox guest additions

# apt install gcc make perl
# /media/hanys/VBox_GAs_6.1.18/VBoxLinuxAdditions.run
# reboot

• install and configure additional software

# apt install net-tools openssh-server vim tmux mc autofs
# vim /etc/idmapd.conf          Configure nfs4 domain
# vim /etc/auto.master          Uncomment /net/ line
# service autofs restart

• create dxxx user account (plus related groups) and set up the account

# groupadd -g 501 dxx
# groupadd -g 508 gr_share
# useradd -c "J..." -g dxxx -G adm,cdrom,dialout,sudo,dip,plugdev,lpadmin,lxd,sambashare,vboxsf,gr_share \
  -m -s /bin/bash -u 501 dxxx
# passwd dxxx

• copy dxxx's config from the server

$ scp -r .ssh <vb-ubuntu>:~/
$ scp -r .tmux <vb-ubuntu>:~/
$ scp .tmux.conf .bash_aliases <vb-ubuntu>:~/

• configure dxxx's account

$ cd ~
$ mv Documents/ Documents.local
$ ln -s /net/192.168.1.2/data/smb/users/dambi/Documents
$ ln -s /net/192.168.1.2/data/smb/users/dambi/projects

By default users with UID lesser than 1000 do not appear on graphical login screen. That can be changed in /etc/login.defs file by customizing UID_MIN, GID_MIN settings.

Note: Does not seem to work on 18.04.

$ sudo vim /etc/gdm3/custom.conf
...
# Enabling automatic login
AutomaticLoginEnable=true
AutomaticLogin=userid
...

$ img2pdf image.jpg > image.pdf

Install necessary packages and restart nautilus…

$ sudo apt install imagemagick
$ sudo apt install nautilus-image-converter
$ nautilus -q

Resize image via right mouse click…

$ man mogrify
$ man convert