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notes:ubuntu_tips [2013/02/02 11:20] – external edit 127.0.0.1notes:ubuntu_tips [2026/10/25 19:30] (current) – external edit 127.0.0.1
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 ====== Ubuntu tips ====== ====== Ubuntu tips ======
-===== Allow users with UID<1000 appear on login screen ===== +===== 20.04 post-install steps ===== 
-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. +  * install VBox guest additions 
 +<code> 
 +# apt install gcc make perl 
 +# /media/hanys/VBox_GAs_6.1.18/VBoxLinuxAdditions.run 
 +# reboot 
 +</code> 
 +  * install and configure additional software 
 +<code> 
 +# 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 
 +</code> 
 +  * create dxxx user account (plus related groups) and set up the account 
 +<code> 
 +# 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 
 +</code> 
 +  * copy dxxx's config from the server 
 +<code> 
 +$ scp -r .ssh <vb-ubuntu>:~/ 
 +$ scp -r .tmux <vb-ubuntu>:~/ 
 +$ scp .tmux.conf .bash_aliases <vb-ubuntu>:~/ 
 +</code> 
 +  * configure dxxx's account 
 +<code> 
 +$ 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 
 +</code> 
 +===== Allow users with UID < 1000 appear on login screen ===== 
 +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.// 
 +===== Enable auto login for user with UID < 1000 on 18.04 ===== 
 +<code> 
 +$ sudo vim /etc/gdm3/custom.conf 
 +... 
 +# Enabling automatic login 
 +AutomaticLoginEnable=true 
 +AutomaticLogin=userid 
 +... 
 +</code> 
 +===== Convert JPG to PDF ===== 
 +<code> 
 +$ img2pdf image.jpg > image.pdf 
 +</code> 
 +===== Resize JPG ===== 
 +==== in nautilus ==== 
 +Install necessary packages and restart nautilus... 
 +<code> 
 +$ sudo apt install imagemagick 
 +$ sudo apt install nautilus-image-converter 
 +$ nautilus -q 
 +</code> 
 +Resize image via right mouse click... 
 +==== CLIs ==== 
 +<code> 
 +$ man mogrify 
 +$ man convert 
 +</code>
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