"登陆": landing. For example : Normandy landing. 台风登陆, a typhon is coming. However, it is not used for the airplane landing. for airplane landing, it is "降落“.
”登入“ to enter, login in something.
"登录" to login in/on.
登录 and 登入 are almost the same on the internet. It's like login in and login on.
literally, ”登" means to climb, the status before you entering something.
"陆“ means land.
"入" means enter.
"录” means register.