我想改变这一点：
--- BEGINNING OF file.txt ---
# use another authentication method.
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all
--- END ---
...对此：
--- BEGINNING OF file.txt ---
# use another authentication method.
# TYPE DATABASE USER ADDRESS METHOD
--- END ---
这是我最新的尝试（添加“-i”）：
sed "s/^\(.*type\s*database\s*user\s*address\s*method\).*$/\1/i" file.txt
谢谢你！