Problems with this advice: ::looping over a file The "loop over the contents of a file" entry does not protect stdin. Use an alternate descriptor. while r

Problems with this advice: ::looping over a file The "loop over the contents of a file" entry does not protect stdin. Use an alternate descriptor. while read -r line <&9 do printf '%s\n' "$line" done 9< "$file" Particularly problematic is ssh, that will pass $line to any remote command that is able to consume it. The looped commands will receive stdin of the loop when an alternate descriptor is used. I use 9 by habit after reading the flock manual page many years ago. ::EXIT trap dash will only call the EXIT trap on a normal exit. Add INT (and any other signal that you want from "kill -l") if you also want to catch abnormal terminations. Windows busybox sh/bash only catches regular exits, no matter what else you add.