How to remove BOM from UTF-8 using sed?
Answer:
# sed -e '1s/^\xef\xbb\xbf//' text.txt
Convert DOS newlines to Unix format
Answer:
To convert DOS newlines (CR/LF) to Unix (LF only), use sed, which can be found on most platforms.
sed "s/\r//" input.txt > output.txt
How to add line number to a file?
Answer:
The easiest way is to use the "sed" command
sed = test.txt | sed 'N; s/^/ /; s/ *\(.\{6,\}\)\n/\1 /'
Convert spaces into new lines using sed
Answer:
If you have a text file like:
1 2 3 4 5
How to convert the spaces into new lines?
Use sed!
# sed 's/ /\n/g' text.txt
How to replace multiple strings using sed?
Answer:
If you have multiple strings to replace, you can either using the "-e" option in sed, e.g.
sed -e 's/a/A/' -e 's/b/B/' < old.txt > new.txt
or, you can use a sed script file to store all the replace conditions
e.g. vi replace.sed
s/a/A/g
s/b/B/g
s/c/C/g
and execute like
sed -f replace.sed < old.txt > new.txt
