To redirect the output of a command to a file, type the command, specify the > or the >> operator, and then provide the path to a file you want to the output redirected to. For example, the ls command lists the files and folders in the current directory.
Use the 'Open' command in the 'File' menu to find, open and edit existing text documents. Other Text Editors Modern versions of macOS include at least two command line text editors: Emacs and Vim.
Command-Line Tools: The Missing Manpages. Unfortunately, many of the command-line utilities in Mac OS X have no corresponding manpages, and documentation on the utilities can be difficult to find, even with a Google search. This appendix offers a quick reference to tools that may be helpful or interesting to Mac OS X developers, but that lack manpages.
Mac Terminal read each.txt file in folder and write (add) as text to specific file 13 How to create a universal (script) file for a Mac, based on several Terminal commands.

You can also use the cat command to view the contents of your file. Just type the following command at the prompt, and then press Enter: cat sample.txt. Create a Text File Using the Touch Command. You can also create a text file using the touch command.

I as a web developer I personally love to keep a ton of things in my Trash. I feel that if I deleted anything prematurely that there may be a version or an image that I can still dig out in a time of need. Sometimes, however, I want to delete something permanently, as I know for sure that there are no future uses for it. Other times, I just need a file that contains no data and is not associated with any applications. Here is a helpful terminal tip for creating and deleting files that I often find creative uses for.

A word of warning for those of you who are not familiar with the Terminal.app: Keep in mind that when using the Terminal to delete things that it is really easy to delete something that you didn't intend to. After deleting a file with the Terminal, there is no way to retrieve it. With that in mind, be certain that the files you wish to eliminate are indeed the files you intended to remove.

Creating files with Terminal

To create a blank file with no associations or data, start by navigating to Utilities | Applications folder and double-click the Terminal.app.

Figure A

Once open, you want to change your location from your User folder to the location where you would like to place the file. I'll be using the Desktop for this example but you can place it in any location that you like.

To change your location within Terminal, simply type at the command prompt:

Figure B

Type the first couple of letters of the word Desktop and press tab to auto complete the directory name.

If you want to know what directory you are in at any time, type pwd at the command prompt.

Figure C

touch filenameFigure D

Figure D

Command For Creating Table In Oracle

Deleting files using the Terminal

Now that we have created this filename file, lets delete it! With your Terminal still open, type the following at the command prompt:

Then Drag the file (filename) from your Desktop into the Terminal window and release. This provides the file's destination so that you don't have to type it manually. Be sure that there is a space between rm -Rf and the directory path.

Figure E

rm -Rf /Users/UserName/Desktop/filename

The command for 'rm' means to remove, the flag 'R' is recursive which will allow you to delete the contents of a directory, and 'f' means force, causing the Terminal to delete the file regardless of the error it may cause. Remove the 'f' if you don't want to risk deleting something that may produce an error.

Once you've typed in the command, press return and the file will disappear from the desktop.

Click to viewThat Mac you're viewing this web page on using a pretty graphical interface? That's a Unix-based system which can run the powerful and age old command line utilities of the most advanced Unix beard. If you've never launched the Terminal, you're missing out on a plethora of Unix tools that offer more control and options than any dialog box possibly could. We've covered some basic Unix command line techniques in the past, but today we've got a few more for folks who want to start their Unix ninja training from the comfort of their own Mac.

Replace Terminal with iTerm

The first stop in your foray into Mac OS X command line goodness is getting yourself a proper terminal. While all the commands we'll discuss will work just fine in the built-in Terminal.app (located in /Applications/Utilities), the free, open source iTerm is a definite improvement over vanilla Terminal. How to download kernel driver virtualbox mac. Mostly because it supports tabbed sessions, which lets you run several tasks in various tabs without taking up screen real estate. Download iTerm here (free). iTerm tab hint: once you've got more than one tab open, use the Ctrl+Right/Left arrow to move between them.

Mac Command Line Options

The Basics

We've already posted a series of beginner's guides to the command line for Windows users running the Unix emulator Cygwin. This is the beauty and advantage of being comfortable at the Unix command line: learn commands once and they'll work most anywhere—on Mac, in Windows/Cygwin, and in most flavors of any Unix-based system. So instead of traversing ground we've already covered, hit up our past tutorials instead (and ignore all the Cygwin-specific stuff):

Introduction to Cygwin—Print the working directory with pwd, create new files with touch my-new-file.txt, and list all the files in a directory with ls.
More useful commands—File listing command options (like ls -lh), aliasing common commands to save typing (like alias 'ls'='ls -lh'), append text to files with >>, see the contents of files with cat, search file contents with grep, using your command history and RTFM'ing with man.
Scripts, packages and more—Logging onto other computers remotely from the command line using ssh and scripting collections of commands for easy execution.

While almost the entire recipe box of established Unix commands work on OS X, there are also a few Mac-specific command line tools that hook into Spotlight, access your iPod and other external disks, launch Mac graphical applications and install more open source applications. Let's take a look.

Launch Applications and Documents

The open command can open up a certain file in its associated application (like open lifehacker.doc will launch Word with lifehacker.doc open) or it can launch a specific application. To open a document, you've got to be in the directory where that document lives; to launch an application, use the -a option to tell Mac OS X to look in the Applications folder. For example, open -a ichat will launch iChat no matter what directory you're in. Using previously-mentioned aliases, you could map the command ichat='open -a ichat' in your .bash_profile to save yourself some keystrokes, too.

Access Files on Your iPod (and Other External Volumes)

Now that you know how to navigate folders and subfolders and file listings, you may want to use your new command line knowledge to check out external disks connected to your Mac, like your iPod. Mac OS X lists all external drives in the /Volumes/ directory. So to get there, type cd /Volumes/ and hit Enter. Then a quick ls will list the available drives. Here I've got an iPod (with disk use enabled in iTunes) called 'Terra's iPod' connected to the Mac. Move into it using cd Terra's iPod (you can use the Tab key after T to autoco

Commandline Command For Creating Text File Mac