This seems to be correct. If you want to be 100% sure you can check the md5sum of the file. Open a new terminal and execute:
Then compare the received value with the value provided in the file
MD5SUMS from the download page of Ubuntu 18.04.1 LTS (Bionic Beaver).
Download that file and then use the
md5sum command with
-compare option to do this check:
md5sum -c MD5SUMS
md5sum will generate a bunch of warnings. Don't worry: the OK message will be buried somewhere within it!
Example (with suppressed error messages):
$ ls -l | grep 'ubuntu.*iso\|MD5SUMS'
-rw-rw-r-- 1 spas spas 138 юли 26 19:56 MD5SUMS
-rw-rw-r-- 1 spas spas 1953349632 ное 27 01:01 ubuntu-18.04.1-desktop-amd64.iso
$ md5sum -c MD5SUMS 2>&1 | grep 'OK'