Linux Snippets

This is a collection of linux tips/commands I found useful during my linux journey. I try out different linux distro every now and then so this post contains a mix of different distro as well. Currently I am running KDE Neon.

Mounting NTFS file system after a fresh installation.

yum --enablerepo=extras install epel-release
yum install ntfs-3g fuse

 

Setup multimedia on CentOS 7

 

When a repository is causing problem, head to

/etc/yum.repos.d/

And open up the repos that’s causing problem and set

enabled=1

to

enabled=0

 

Find dependencies for a particular package

yum deplist <package name>

Example:

yum deplist vlc

 

Find out where a package comes from

yum provides <packgage name>

 

Dependencies for Handbrake

 

Easiest way I found to install nvidia driver on Cent OS 7

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
yum install nvidia-detect
 yum install $(nvidia-detect)

 

Install Skype on Cent OS 7

Guide on centos wiki here states the easiest method is to use the nux-desktop repository, but at the time of writing this even though I have nux-repo yum can’t seem to find skype package, so here goes
get https://repo.skype.com/latest/skypeforlinux-64.rpm
sudo yum localinstall skypeforlinux-64.rpm

 

Install RawTherapee

http://rawpedia.rawtherapee.com/Linux#CentOS

 

Wacom multiple monitor mapping with xsetwacom (Wacom settings not found in KDE Plasma)

https://github.com/linuxwacom/xf86-input-wacom/wiki/Dual-and-Multi-Monitor-Set-Up-II
 

When device doesn’t shows up on KDE Connect (You can run the following commands each time, or use the append argument to add it to it permanently)

iptables -I INPUT -p tcp --dport 1714:1764 -j ACCEPT
iptables -I INPUT -p udp --dport 1714:1764 -j ACCEPT

 

Maya fonts error

sudo yum install xorg-x11-fonts*

 

Combine pdf file with command line, details here

sudo yum install pdftk
pdftk file1.pdf file2.pdf file3.pdf output outputName.pdf

 

Open a .jar file with java.

java -jar file.jar

 

Find and delete duplicate files

https://www.tecmint.com/fdupes-find-and-delete-duplicate-files-in-linux/

 

Tell yum to treat a manually installed package as installed, solution found hereTwo possible solutions.

1) You will need to download the package that you want to install and install them via the rpm command using the –nodeps option. To download the rpms, you should first ensure that you have the “yum-utils” package installed because it contains the “yumdownloader” command. Let’s say the package name is “something-xyz”. Here are the commands to download and install that package:
# Download the package
yumdownloader something-xyz

# Test whether emacs is the only dependency.
rpm -Uvh --test something-xyz.rpm

# If emacs is the only dependency, then install the package
rpm -Uvh --nodeps something-xyz.rpm

If there are other dependencies, than you can try to install via yum if they are not dependent on emacs. Otherwise, you will need to do the same process as above to install them.

2) If all of this does not work with your hand installation of emacs, then the last resort would be to install the emacs version that yum by default wants to install, but invoke your own version of emacs instead of the one yum installs.

 

Formatting a USB drive with FAT32 file system
First find out its mount point

 fdisk -l

or this

 lsblk

then

 mkfs –t vfat

 

According to this post here, changing/adding environment paths in CentOS 7 by adding .sh file in /etc/profile.d, below is sample of adding pycharm/bin

In CentOS

# echo 'pathmunge /opt/pycharm-edu-2018.2/bin/' > /etc/profile.d/pycharm.sh

In Ubuntu

# echo 'PATH="/opt/pycharm-edu-2018.2/bin/:$PATH"' > /etc/profile.d/pycharm.sh

Next,

# chmod +x /etc/profile.d/pycharm.sh
# . /etc/profile

 

Customizing extra buttons on my mouse, reference askubuntu, stackexchange and ArchWiki

  • Install the required packages
    sudo yum install xev xbindkeys xdotool

    In my case xev was already installed

  • Create a default xbindkeys configuration file
    xbindkeys -d > ~/.xbindkeysrc
  • To find out mouse button name, run xev in terminal, it’ll open a blank window for you to move or click your mouse in. But note that it will also print mouse movement, so to isolate mouse clicks only run this instead
    xev -event mouse | grep Button --before-context=1 --after-context=2
  • Open ~/.xbindkeysrc with your preferred text editor, and this is where you map specific functions to your mouse button with the button names you gathered from previous step. For my purpose I was mapping button 8 and 9 to volume control, which resulted in the code below in my ~/.xbindkeysrc
    "xdotool key XF86AudioLowerVolume"

    b:8

    "xdotool key XF86AudioRaiseVolume"

    b:9

    You can either search or use my reference above to find other configuration methods.

 

Command to open default terminal program

x-terminal-emulator

works for most Debian distros…While trying to find something that works across distros I found this amazing yet ridiculous solution

 

Dolphin Plugin: Copy as path

This plugin adds an option in dolphin right click menu to Copy Path

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