Environment variables in etc/profile cannot be logged on.

Setting environment variables in etc/profile causes login failure solution 1, you cannot log on because you are accidentally setting environment variables in etc/profile. Do not set export PATH in etc/profile. This will cause the system to fail to log on after restart. In the logon interface, alt + ctrl + f2 command mode, if the root user is not the root user, enter [the root user cannot be so arrogant, gedit editing will not display]/usr/bin/sudo/usr/bin/vi/etc/environment move cursor to export PATH ** row, delete this row two times in a row by d. Press: wq -- [here I am miserable, in fact, it is to press shift and then enter ":", then enter wq In The Back] Save and quit Typing/sbin/reboot to restart the system