1. Linux Watch Command
2. Linux Watch Command Examples

Question or issue on macOS:

I’m looking for the best way to duplicate the Linux ‘watch’ command on Mac OS X. I’d like to run a command every few seconds to pattern match on the contents of an output file using ‘tail’ and ‘sed’.

What’s my best option on a Mac, and can it be done without downloading software?

Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. MacOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. Just open the Terminal and type in the following command: say 'Hello, from MacLife' This will cause the default selected voice in OS X to spring to life and say the words that are wrapped in quotes. OS X Daily shows how to do it with a Terminal command. OS X Daily shows how to do it with a Terminal command. Watch Out for Fake COVID-19 Testing Sites. Unix & Linux: Do I need a Linux distro to learn the command line or would OS X be sufficient?Helpful? Please support me on Patreon: https://www.patreon.com/.

How to solve this problem?

Solution no. 1:

You can emulate the basic functionality with the shell loop:

That will loop forever, clear the screen, run your command, and wait two seconds – the basic watch your_command implementation.

You can take this a step further and create a watch.sh script that can accept your_command and sleep_duration as parameters:

Solution no. 2:

Adobe photoshop cs6 crack amtlib dll 64 bit download. With Homebrew installed:

brew install watch

Solution no. 3:

Use MacPorts:

Solution no. 4:

The shells above will do the trick, and you could even convert them to an alias (you may need to wrap in a function to handle parameters):

Examples:

Alternately, Homebrew can install the watch from http://procps.sourceforge.net/:

Solution no. 5:

It may be that “watch” is not what you want. You probably want to ask for help in solving your problem, not in implementing your solution! 🙂

If your real goal is to trigger actions based on what’s seen from the tail command, then you can do that as part of the tail itself. Instead of running “periodically”, which is what watch does, you can run your code on demand.

Note that tail -F will continue to follow a log file even if it gets rotated by newsyslog or logrotate. You want to use this instead of the lower-case tail -f. Check man tail for details.

That said, if you really do want to run a command periodically, the other answers provided can be turned into a short shell script:

Solution no. 6:

I am going with the answer from here:

But you’re really better off installing watch as this isn’t very clean…

Solution no. 7:

If watch doesn’t want to install via

Linux Watch Command

There is another similar/copy version that installed and worked perfectly for me

Solution no. 8:

Linux Watch Command Examples

Or, in your ~/.bashrc file:

Solution no. 9:

To prevent flickering when your main command takes perceivable time to complete, you can capture the output and only clear screen when it’s done.

Then use it by:

Solution no. 10:

I had a similar problem.

When I googled, I came across the blog post Install Watch Command on Mac OS X recently. This is not exactly ‘installing software’, but simply getting the binary for the ‘watch’ command.

Hope this helps!

If you’re working in Terminal on your Mac, you need to know the most important UNIX commands: those that work with directories, those that work with files, and miscellaneous but commonly used commands.

Folders are called directories in UNIX. Commands that refer to filenames, as most do, assume that you’re talking about files in the working directory. When you open the Terminal window, the working directory is set to your home directory, abbreviated ~. Bash shows you the current working directory and your username to the left of its prompt. The following table lists common directory-related commands.

As in Windows, you can redirect the output of a command to a text file. So if you want a record of the files in a folder, type cd, followed by a space, drag the folder’s icon to the Terminal window, and press Return. Type ls > mydirectorylist.txt and press Return again. A file named mydirectorylist.txt will appear in the folder you chose. You can open the file in TextEdit to see a list of the files in that directory.

This table lists commands commonly used when working with files in the Terminal window.

This last table explains other handy commands that anyone getting started in Terminal will likely want to know.

When you’re working in Terminal, you don’t have a Trash Can to which deleted files are moved pending ultimate disposal. Delete it, and it’s gone. In general, UNIX has no Undo function.