Undelete! How to undelete a file accidentally removed using rm on Linux, by grepping through the raw bytes on the hard drive searching for a unique string that was contained in the file. “grep -a -B 25 -A 100 ’some string in the file’ /dev/sda1 > results.txt”
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Just be sure you do it promptly, before other file activity on the system overwrites that area of the filesystem.