"echo "password" | sudo -S <command>" asks for password - linux

Question

I trying run a script without become the su user and I use this command for this:
echo "password" | sudo -S <command>
If I use this command for "scp", "mv", "whoami" commands, the command works very well but when I use for "chmod", the command asks for password for my user. I don't enter password and the command works. My problem is the system asks password to me. I don't want the system asks for password.
Problem ss is like this:
[myLocalUser#myServer test-dir]$ ls -lt
total 24
--wx-wx-wx 1 root root 1397 May 26 12:12 file1
--wx-wx-wx 1 root root 867 May 26 12:12 script1
--wx-wx-wx 1 root root 8293 May 26 12:12 file2
--wx-wx-wx 1 root root 2521 May 26 12:12 file3
[myLocalUser#myServer test-dir]$ echo "myPassw0rd" | sudo -S chmod 111 /tmp/test-dir/*
[sudo] password for myLocalUser: I DONT WANT ASK FOR PASSWORD
[myLocalUser#myServer test-dir]$ ls -lt
total 24
---x--x--x 1 root root 1397 May 26 12:12 file1
---x--x--x 1 root root 867 May 26 12:12 script1
---x--x--x 1 root root 8293 May 26 12:12 file2
---x--x--x 1 root root 2521 May 26 12:12 file3

Answer 1

You can use the sudoers file, located in /etc/sudoers, to allow specific users execute commands as root without password.
myLocalUser ALL=(ALL) NOPASSWD: /bin/chmod
With this line the user myLocalUser can execute chmod as root without a password is needed.
But this also breaks parts of the system security, so be aware not allow too much and fence the task as much as possible.
sudoers information

Answer 2

sudo -S prints prompt to stderr.
If you don't want to see it, redirect stderr to /dev/null
The following command redirects stderr at the local host:
echo <password> | ssh <server> sudo -S ls 2>/dev/null
It is equivalent to echo <password> | ssh <server> "sudo -S ls" 2>/dev/null
The following command redirects stderr at the remote server:
echo <password> | ssh <server> "sudo -S ls 2>/dev/null"
If you need to keep stderr, but hide [sudo] password for ... then you can use process substitution on the local or remote machine. Since sudo prompt has no newline, I use sed to cut out the sudo prompt. I do this to save the first line of stderr of the created process.
# local filtering
echo <password> | ssh <server> "sudo -S ls" 2> >(sed -e 's/^.sudo[^:]\+: //')
#remote filtering
echo <password> | ssh <server> "sudo -S ls 2> >(sed -e 's/^.sudo[^:]\+: //')"