Stream Editor for filtering and transforming text.
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p
print
-
a
appand
-
g
globle
-
i
insert
-
e
Exuited Command
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c
change
-
-i
save file
-
-n
silent
sed -n '1p' file_name
sed -n '/search_name/p' file_name
sed '2!p' file_name
cat file_name | sed 's/root/ROOT'
sed 's/root/ROOT/g' file_name
ps -aux | sed 's/root/ROOT/g' > new_file_name
sed '1-4 s/search_name/change_search_name' >> old_File_name
sed '1-$/p' file_name > old_File_name
sed '^-4/p' file_name >> new_file_name