Occasionally when using bash after installing or updating packages, you may run into a problem like the following when trying to invoke a command:
#nano example.txt -bash: /usr/bin/nano: No such file or directory
In this case, after verifying the location of nano through which or whois, and checking your $PATH, you show the path is correct and the command is installed correctly.
# which nano /usr/bin/nano
# whereis nano nano: /usr/bin/nano /usr/share/nano /usr/share/man/man1/nano.1.gz
# echo $PATH /usr/local/jdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin/
Once you've confirmed that it should be working, the problem can be fixed in one of two ways.
1. Start a new bash session by terminating your current one.
2. Run the following command:
hash -r
The hash command is a bash built-in to reload bash.