Are there any packer detectors, similar to PEiD that can be used on Linux? Both for ELF and PE formats.
I have tried to find a similar tool, but all I found is a manual method of searching for strings within the executable, which is not a very efficient and effective method.
Detect It Easy
Detect It Easy is more complex, rich and accurate detector than the competitors (in my opinion) which uses "scripts" to detect the type of the program. The detection algorithm of DIE is more complex then the others and doesn't use only byte-mask to detect the Compiler/Linker/Packer/etc.
You can read more about Detect it Easy in its Github repository.
Detect It Easy is available for Linux machines.