Ubuntu – How to check crc of a file

If the folders are in the same folder that the file exists, then use:

for dir in *; do [ -d "$dir" ] && cp YOURFILE.EXT "$dir" ; done

In other scenery, if the file is in a different path, use:

for i in folder1 folder2 folder3 folder4; do cp YOURFILE.EXT $i; done

If you don't know what exactly are the names of the folders where to put the file, try:

There is no need to make a script. Simply drop these commands in a terminal and check the results.

Glossary:

YOURFILE.EXT = The name of your file, may contain the full path.
folder1 folder[...] = the name of the folders where to drop the file,
-- folder names may contain the full path.

sha1sum

Print or check SHA1 (160-bit) checksums. With no FILE, or when FILE is -, read standard input.

sha1sum {file}

If you want to send the file together with its sha1sum output redirect the output to a file:

sha1sum {file} > {file}.sha1

Send both files and the other party can do a...

sha1sum -c {file}.sha1

It should show OK if the sha1 is correct.