cat hosts.txt | parallel --quote --timeout=10 ssh {} 'echo {} $(md5sum ~/.config/file)' Also try: parallel --slf hosts.txt --timeout=10 --nonall --tag md5

cat hosts.txt | parallel --quote --timeout=10 ssh {} 'echo {} $(md5sum ~/.config/file)' Also try: parallel --slf hosts.txt --timeout=10 --nonall --tag md5sum .config/file