UNIX for Dummies Questions & Answers

Code:

[_@_ ~]$ cat nu
who | wc -l
[_@_ ~]$ ls -l nu
-rwxr-x--- 1 _ _ 11 Jul 30 12:37 nu //the nu is displayed in green color
[_@_ ~]$ nu
bash: nu: command not found

I am using a book from 1986 on Unix System V, Release 3, and the Unix system I am connecting to is from my college.

Below is the notes from the book:

//whenever you type something like this: who | wc -l, you are actually programming in the shell! thats because the shells the
//one thats interpreting the command line, recognizing the pipe symbol, connecting the output of the first command to the input
//of the second, and initiating execution of both commands

//a shell program can be written directly at the terminal, as in who | wc -l, or it can be typed into a file and then the file
//can be executed by the shell. this is useful when you need to perform a task several times a day

//before you can run a file with commands, you need to first make it executable. this is done by changing command mod "chmod",
//and to make it executable

chmod +x file(s) //makes listed file(s) executable by changing its mode command

//the shell requires that a file be both readable and executable to be run

Try:

Code:

./nu

thanks worked perfectly!!

Unless you give a pathname for the command to be executed that contains a slash character, the command must be in a directory on your command search path. If you are using a shell that uses basic Bourne shell syntax, the command search path is specified by the PATH shell variable. If you issue the command:
echo "$PATH" you will see a list of directories separated by colons. Many administrators set up the default PATH for users on their system to include the current directory; others don't. It looks like yours doesn't. There are several ways to execute nu in this situation. They include:

Thanks this made it easier!