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Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04,Ninth Edition by Paul Hudson, Andrew Hudson, Matthew Helmke

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Finding Files from an Index with locate

When you use the find command, it searches recursively through each directory each time you request a file. This is slow, as you can imagine. Fortunately, Ubuntu ships with a cron job that creates an index of all the files on your system every night. Searching this index is extremely fast, which means that if the file you are looking for has been around since the last index, this is the preferable way of searching.

To look for a file in your index, use the command locate followed by the names of the files you want to find, like this:

matthew@seymour:~$ locate myfile.txt

On a relatively modern computer (say, with at least one processor that runs at 1.5GHz or higher), locate ...

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