When I try to switch to root using sudo -i i get the error /var/tmp/sclDvf3Vx: line 8: -i: command not found... However, su - works which I will continue to use. I'm by no means a linux system administrator so the environment is still pretty foggy to me. I guess my questions are:Why is the error being thrown? What's the difference between the two commands? Why would you use one over the other?Update:I'm using CentOS version: CentOS release 6.6 (Final)Here's the output from some commands I was asked to run, in the comments below.  type sudo : sudo is /opt/centos/devtoolset-1.1/root/usr/bin/sudo sudo -V : /var/tmp/sclIU7gkA: line 8: -V: command not foundgrep'^root:' /etc/passwd : root:x:0:0:root:/root:/bin/bashUpdate:This was added to my non-root user's ~/.bashrc a while back because i needed C++11 support. When I comment it out, re-ssh in, I can run sudo -i just fine without any errors.if [ $(gcc -dumpversion) != 4.7.2 ]; then   scl enable devtoolset-1.1 bashfi
sudo -i returns an error
linux;centos;command line;sudo