linux_setup

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=================set vim as default editor=======

sudo update-alternatives --config editor


===================visudo=========================

#to edit /etc/sudores type:
visudo

--settings--
# Default for password prompt to stay up with no user input 0=forever
Defaults passwd_timeout=0

# Defualt for a session to remember your password 0=always  0<forever (i.e a negative number)
Defaults timestamp_timeout=0

-- dissable password prompt completley--

Edit the sudoers file type:

sudo visudo

Then Find this line:

%sudo ALL=(ALL) ALL


Change the line to become:

%sudo ALL=(ALL) NOPASSWD: ALL





==================NVIDIA====================================
# If you want to revert back to stock nvidia conf file
sudo nvidia-xconfig 

set nvidia as gpu
sudo mhwd-gpu --setgl nvidia


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===========Installing debian packages on arch ==========

---option1-----
pacman -S dpkg
dpkg -i package.deb

---option2------
pacaur -S deb2targz
deb2targz filename.deb
pacman -U /path/to/filename.tar.gz


====yum on arch=========

yum search something

yum install something

yum install something.i586.rpm

==============THE KEREL===========================
#list available kernels
mhwd-kernel -l

#install a kernel
sudo mhwd-kernel -i linux40 rmc


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=====================Manage packages==========================

#Create a backup of what packages are currently installed:
dpkg --get-selections > list.txt

#Then (on another system) restore installations from that list:
dpkg --clear-selections
sudo dpkg --set-selections < list.txt

#To get rid of stale packages
sudo apt-get autoremove

#To get installed like at backup time (i.e. to install packages set by dpkg --set-selections)
sudo apt-get dselect-upgrade

--------How to list installed package and its details on ubuntu-----------

#Simple and elegant:

sudo dpkg -l | more

#or

sudo dpkg -l | less

#If you want to get the description of some specific packages say firefox:
sudo dpkg -l | grep firefox

#To get the date and time of packages being installed
cat /var/log/dpkg.log | grep " install "

#To get for specific package:
cat /var/log/dpkg.log | grep " install " | grep banshee