New user needs help with pam authentication software

[tanmoydas15]

rana@rana-desktop:~$ tar -xf pam-face-authentication-0.3.tar.gz
rana@rana-desktop:~$ cd pam-face-authentication-0.3
rana@rana-desktop:~/pam-face-authentication-0.3$ mkdir build
mkdir: cannot create directory `build': File exists


Please help me . Because I'm a new user.

[raja.genupula]

rana@rana-desktop:~$ tar -xf pam-face-authentication-0.3.tar.gz
rana@rana-desktop:~$ cd pam-face-authentication-0.3
rana@rana-desktop:~/pam-face-authentication-0.3$ mkdir build
mkdir: cannot create directory `build': File exists


Please help me . Because I'm a new user.

look for a read me file in the extracted folder , you gonna find the instructions in that to install .

[oldos2er]

Post moved to its own thread. Please don't hijack other people's threads.