You Asked: How Do You Replace a Word in Unix Without Opening It?

Though most common use of SED command in UNIX is for substitution or for find and replace. By using SED you can edit files even without opening it, which is much quicker way to find and replace something in file, than first opening that file in VI Editor and then changing it. SED is a powerful text stream editor.

How do you replace a word in Unix?

The procedure to change the text in files under Linux/Unix using sed:

1. Use Stream EDitor (sed) as follows:
2. sed -i ‘s/old-text/new-text/g’ input. …
3. The s is the substitute command of sed for find and replace.
4. It tells sed to find all occurrences of ‘old-text’ and replace with ‘new-text’ in a file named input.

How do you replace a word with awk in Unix?

Type the following awk command:

1. awk ‘{ gsub(“,”,””,$3); print $3 }’ /tmp/data.txt.
2. awk ‘BEGIN{ sum=0} { gsub(“,”,””,$3); sum += $3 } END{ printf “%.2fn”, sum}’ /tmp/data.txt.
3. awk ‘{ x=gensub(“,”,””,”G”,$3); printf x “+” } END{ print “0” }’ /tmp/data.txt | bc -l.