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Wednesday, February 13, 2013

How to set path in ubuntu

To set path for new program you just need to edit .profile or .bash_profile file
which is present in /etc . for example if you want to set path for program xyz
which is present in /usr then export PATH=":/usr/xyz"

don't forget to put ":" before /usr/xyz otherwise it will overwrite the path variable
and path variable will no longer have it's original values.

Monday, February 11, 2013

Could not connect to session bus




"could not connect to session bus: //bin/dbus-launch terminated abnormally without any error message"


if you get error message like this on ubuntu it means value of PATH variable has changed and hence it's not able to run /usr/bin/dbus-launch . On the login screen Press CTRL+ALT+F1, then type in your regular name and password. and run export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" now restart system and then after login set path variable .profile file.

Sunday, February 10, 2013

SU:Authentication Failure

            when you install ubuntu and run su command first time it will show the message authentication failure.so you need to set super user password by running the following command.
$ sudo passwd
then it will ask for new password and then confirm password.
after this u can run su command.

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