Listing all aliases

You should also know that aliases are user-specific. So the aliases created by elliot will not work for user smurf; take a look:

elliot@ubuntu-linux:~$ su - smurf 
Password:
smurf@ubuntu-linux:~$ date 
Mon Nov 4 13:33:36 CST 2019
smurf@ubuntu-linux:~$ memory
Command 'memory' not found, did you mean: 
    command 'lmemory' from deb lmemory
Try: apt install <deb name>

As you can see, smurf can't use the aliases of user elliot. So every user has their own set of aliases. Now, let's exit back to user elliot:

smurf@ubuntu-linux:~$ exit 
logout
elliot@ubuntu-linux:~$ memory
         total     used     free     shared     buff/cache     available
Mem:      3.9G     937M     2.0G       6.6M      990M               2.7G
Swap:     947M       0B     947M 

You can run the alias command to list all the aliases that can be used by the currently logged-in user:

elliot@ubuntu-linux:~$ alias 
alias date='date;cal'
alias egrep='egrep --color=auto...