etc error in ubuntu while starting system

Question

While installing Java I did something and now getting this error.

Answer 1

Backup your existing /etc/profile by running sudo cp /etc/profile /etc/profile.bak. Then edit your /etc/profile by running sudo nano /etc/profile. Below is my /etc/profile for comparison to yours. You could replace your your /etc/profile with one from a live disk or the one below. If you had customizations in yours you can then run diff /etc/profile /etc/profile.bak to find the differences and add back the needed customizations then test each, one at a time.

# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).
if [ "$PS1" ]; then
  if [ "$BASH" ] && [ "$BASH" != "/bin/sh" ]; then
    # The file bash.bashrc already sets the default PS1.
    # PS1='\h:\w\$ '
    if [ -f /etc/bash.bashrc ]; then
      . /etc/bash.bashrc
    fi
  else
    if [ "`id -u`" -eq 0 ]; then
      PS1='# '
    else
      PS1='$ '
    fi
  fi
fi

if [ -d /etc/profile.d ]; then
  for i in /etc/profile.d/*.sh; do
    if [ -r $i ]; then
      . $i
    fi
  done
  unset i
fi