Redirectors
Pipe | Output Redirector > Input Redirector <
FD DefaultDevice 0 stdin keyboard < 1 stdout Screen > 2 stderr Screen
File Descriptor --> A number assigned to a file by your OS.
> # Will print output onto the file 2> # will print stderr onto the file > 2>&1 # Will print both stderr & stdout to the file.
find / -type f -size +100M > output.log 2>&1
wc lines, characters and words