bug-grep@gnu.org >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> I have started to get this sort of messages with awk and grep.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Windows Subsystem for Linux Distributions: Ubuntu-18.04 (Default) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> whrads@HHA:/mnt/c/Users/whrads/Downloads$ cat Exported*.txt | sort | uniq > ZcatSort.txt whrads@HHA:/mnt/c/Users/whrads/Downloads$ awk !visited[$0]++ Exported*.txt > ZawkVisited.txt -bash: !visited[: event not found whrads@HHA:/mnt/c/Users/whrads/Downloads$ grep -E -i -h \.gif|\.jpeg|\.jpg|\.png|\.webp|\.gifv|\.mp4 Exported*.txt > ZImage.txt .jpg: command not found .mp4: command not found .gifv: command not found .png: command not found Command '.jpeg' not found, did you mean: Command '.webp' not found, did you mean: command 'djpeg' from deb libjpeg-progs command 'cwebp' from deb webp command 'djpeg' from deb libjpeg-turbo-progs command 'vwebp' from deb webp command 'cjpeg' from deb libjpeg-progs command 'dwebp' from deb webp command 'cjpeg' from deb libjpeg-turbo-progs Try: sudo apt install <deb name> Try: sudo apt install <deb name>