svn setup and some useful commands

su -
cd /var
mkdir nih
chmod 775 nih
chown root:mip nih
exit

Now, as a normal user,
cd /var/nih
svn co http://svn/nih .

Also, Please add the below line in the /etc/profile
export SVN_EDITOR=/usr/bin/vim

Other useful svn commands
SVN checkin:
svn ci -m "updated file.c by satish"
SVN updation to recently version:
svn update
SVN checkout particular revision let's say 246
svn co -r 246 http://svn/nih .