sudo cat << EOF> File doesn't work, sudo su does

Question

I tried the following on the command prompt in bash:

sudo cat << EOF > /etc/yum.repos.d/some-name.repo
#Content
#....
#...
EOF

It

Answer 1

if you are using ' inside the text then you may use:

$ sudo bash -c "cat > /etc/postfix/mysql-virtual_forwardings.cf << EOF
user = mail_admin
password = password
dbname = mail
query = SELECT destination FROM forwardings WHERE source='%s'
hosts = 127.0.0.1
EOF
"

this is tested on google cloud's virtual server centos 7.0