# sed
# A stream editor. Used to perform basic text transformations

# Preview a file edit, via substitution.
sudo sed 's/Name=Xfce Session/Name=Xfce_Session/' FILE

# Replace the same string more than once per line (g flag)
sudo sed 's/Name=Xfce Session/Name=Xfce_Session/g' FILE

# Edit a file (adding -i flag), in-place; changes are made to the file(s).
sudo sed -i 's/Name=Xfce Session/Name=Xfce_Session/' FILE

# It can become necessary to escape special characters in your string.
sed -i 's/\/path\/to\/somewhere\//\/path\/to\/anotherplace\//' FILE

# Change your sed delimiter to a pipe to avoid escaping slashes.
sed -i 's|/path/to/somewhere/|/path/to/anotherplace/|' FILE