How to know if password in /etc/shadow is hashed with SHA or MD? I want to know my `/etc/shadow` password hash if its SHA or MD or something else. From what I read, it is related to the `$` sign, but I don't have any dollar signs. Im using Ubuntu 16 Example: user:0.7QYSH8yshtus8d:18233:0:99999:7:::

The `shadow(5)` manual on Ubuntu refers to the `crypt(3)` manual. The `crypt(3)` manual says that the default password encryption algorithm is DES.

It goes on to say that the `glibc2` library function also supports MD5 and at least SHA-256 and SHA-512, but that an entry in `/etc/shadow` for a password encrypted by one of these algorithms would look like `$1$salt$encrypted` (for MD5), `$5$salt$encrypted` (for SHA-256), or `$6$salt$encrypted` (for SHA-512), where each `$` is a literal `$` character, where `salt` is a salt) of up to 16 characters, and where `encrypted` is the actual hash.

Since your encrypted password does not follow that pattern, I'm assuming that it's encrypted using the default DES algorithm.