[cat] Forum Topics

Why is it that no matter how long I put the sleep command or loop, cat is unable to read the file, even though the file already exsists? Is there any way of reliably waiting for the whois to finish, write to file and then read that the file exsists?? …

I was supposed to write a program that reads and writes phone numbers of people to a file called phones.txt. The reading part works. The write part doesn't. I tried to use the cat command because I thought doing cat >> file.txt would simply append to a file. What it …