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Also, what OS are you on, from Lion onwards Terminal reloads the last 500 lines out output even from the last closed screen on restart. …

This is controlled by the shell variable $PS1 You can set this variable to whatever you want, either temporarily or more permanently with a .login or .profile script depending on what shell you use. …

iTunes uses a database file to maintain a track of all the meta data on the contents of the iTunes library. Opening multiple instances of iTunes would potentially result in the 2nd instance being una …

Yes, this is dead easy to test. Write a perl script that appends the date to a file every minute, and run it in the background. Log out, wait 5 minutes, log in, check for 5 entries corresponding to …

cat xaa > newfile cat xab >> newfile cat xac >> newfile Basically using a single '>' operand send the output to a new file. using a double '>>' operand makes it append the contents to the end of an …

In a bash shell, to set a variable, simply use set NAME=bob or set VITAL_SIGNS=none. You can also set a variable using the output of a command by calling the bash-builtin function read to assign the …

You can type this into pretty much any command line shell, simplest to just open Terminal and type it straight into it while true do /path/to/script.py sleep 60 date >> /path/to/logfile.txt …

Take a look at your filesystem, as there are both case sensitive and case insensitive variations on HFS. The default is case insensitive, in which case it's not so much a case of BASH, but the underl …

I would like to use the terminal to monitor the network traffic on a given interface, with a view to providing alerts when certain cumulative totals have been exceeded. … I do not wish to download any tools or applications, and just wish to use the tools a standard installation provides for the terminal. …

Now, you can do all this at the command line by passing the appropriate parameters on the terminal, but as long as you have set up your Mail app, this config is already stored, and by simply temporarily … firing up the mail subsystem the terminal commands can grab that info and now have one or more mail smtp servers they can choose to send outgoing messages. …

Either your alias is only pulling the first bit before the space, or your for loop is only reading the first bit You can test this by adding some test commentary into your commands, I've limited the …