There are various situations on a server or hosting, where we want to create a file or folder and have in its name the date it was created.
An example of a command in linux, by which we can create a folder, looks like this
mkdir FOLDERNAME_`date +%d-%m-%Y_%H-%M-%S`
Here is another example where we create a file with ping result (one file/hour) – command add all lines to the end of the file.
ping -i 3 -c 10 google.com >> ping-google.com_`date +%Y.%m.%d.%H`.txt &
-i 3=> interval between successive packet transmissions.
-c 1200=> the number of times to send the ping request
-w 3600=> a timeout, in seconds, before ping exits, regardless of how many packets have been sent or received.
&=> nohup command & (detach a process from its terminal)
>>=> write the result in the file