I. Case
wget , download a powerful command . If for downloading files midway due to a local network problem disconnected, not downloaded, re-run a bit WGET command , you will find completely re-download the new file name will add 1 back .....
This is wget problem re-download download failed encounter,
-rw-r--r-- 1 root root 2.3G Sep 14 22:57 a.tar.gz -rw-r--r-- 1 root root 20M Sep 14 20:46 a.tar.gz.1
Second, the resume
-c https://a.com/a.tar.gz wget # This parameter will resume before the document.
# Automatically retry until the download is complete wget -t -c https://a.com/a.tar.gz 0 # default will retry 20 times, -t 0 has let him retry!
Third, other extensions
# Download entire Web page it wget -p https://a.com/
# URL to download the file you need to specify a username and password wget https://a.com/a.tar.gz --user = name --password = passwd
More, typing man wget