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I am using bash shell on Solaris 5.10.Daily I get some files having name pattern yyyy_mm_dd(like 2012_12_21).I keep only 3 days files and I delete the rest of them.Now I require 3 days back date to delete it.please suggest me how to get a backdate in shell script.
The standard solution is to use
find. If you really prefer to reinvent that particular wheel,date -d "3 days ago"will print the requested date.