When trying to push a couple lines to the end of a file, I get a permission issue. I understand why I'm getting the error, but I can't think of a way to resolve it. Any help would be appreciated.
sudo cat > /etc/php5/apache2/php.ini << EOF
# extensions
extension=”memcached.so”
extension=”apc.so”
EOF
Heredoc usage, or "appending to EOF", is not the problem.
All redirections (including >) are applied before executing the actual command. In other words, your shell first tries to open /etc/php5/apache2/php.ini for writing using your account, then runs a completely useless sudo cat.
One way to get around this:
sudo bash -c "cat >> /etc/php5/apache2/php.ini" <<EOF
(You can run an interactive shell via sudo -s, or use dd or tee for writing to the file.)
On a related note, using > will overwrite the old php.ini. Use >> to append.
To expand on the answer by @grawity, showing how to use tee:
sudo tee /etc/php5/apache2/php.ini >/dev/null <<EOF
# extensions
extension=”memcached.so”
extension=”apc.so”
EOF
or use the "-a" option of tee for appending instead of overwriting.
sudo su and then you have a proper shell as root. Run the command in there, without sudo prefix. Afterwards, exit to return from the root shell.
