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cut -d, f1 file2 output: field1

cut -d, -f1,2 file2 output: field1,field2

cut -d, f1-3 file2 output: field1,field2,field3

cut -d" " -f1-4 file1 output: field1 field2 field3 field4

cut is used to extract field in a specific file

cut -d:" " -f1,3,7 /etc/passwd

sed = stream ( i think i heard stream) line editor = search for a key word and replace it with something else

Example: head -n1 access.log |head -n1

sed 's/GET/GOT/g' access.log |head -n1