#pipecharacter

comand1 | command2 So in a kinda practical example without talking about grep, say command1 checks if a directory exists and outputs either true or false and then command2 takes either true or false and if true it will make a file called something.txt so combining these commands will check if the directory exists and if it does it will create the file. Understanding this character is kinda a requirement for learning your way around the terminal, and as such if you're interested but didn't quite understand feel free to send me a message and I'll message back eventually