[SOLVED] Pipe command with sudo

Issue

I have a script which run this command successfully. I am using this command in another script which gives me error on this line (.md5: Permission denied).

I am running the previous script with sudo.

for i in ${NAME}*
do
    sudo md5sum $i | sed -e "s/$i/${NAME}/" > ${NAME}.md5${i/#${NAME}/}
done

Solution

So you want to redirect output as root. It doesn't matter that you executed the command with sudo, because redirection is not part of the execution, so it's not performed by the executing user of the command, but by your current user.

The common trick is to use tee:

for i in "${NAME}"*
do
    sudo md5sum "$i" | sed -e "s/$i/${NAME}/" | sudo tee "${NAME}.md5${i/#${NAME}/}"
done

Note: tee outputs in two directions: the specified file and stdout. If you want to suppress the output on stdout, redirect it to /dev/null.

Answered By - janos

Answer Checked By - Mildred Charles (WPSolving Admin)