I need a command that retrieves the last modified date and another that gives the size of a file.
I've looked everywhere, and I cannot find commands like this.
LS will not work.
The most common command for this is stat(1). Some variants, notably GNU stat, allow specification of the output format, which simplifies parsing.
$ stat t.txt
Size: 48 Blocks: 8 IO Block: 4096 regular file
Device: fd00h/64768d Inode: 7078223 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 500/ ignacio) Gid: ( 500/ ignacio)
Access: 2013-06-25 09:04:32.600422989 -0400
Modify: 2013-06-24 00:10:57.925679368 -0400
Change: 2013-06-24 00:10:57.970679307 -0400
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