By Eric J. Ray
With Unix, 4th version: visible QuickStart consultant, readers can commence from the start to get a travel of the Unix working procedure, or search for particular projects to benefit simply what they should recognize. This task-based, visible reference advisor makes use of step by step directions and lots of screenshots, and comprises 3 years worthy of recent fabric in accordance with the most recent Unix advancements. This reference advisor information all Unix instructions and concepts in addition to assistance that positioned these instructions in context. major Unix experts Deborah S. Ray and Eric J. Ray leverage their services as technical writers and dealing within the (Sun Microsystems) as they take readers step by step in the course of the most typical Unix instructions and innovations.
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Extra resources for Unix and Linux: Visual QuickStart Guide
3. When you copy directories and files, all you’re doing is putting a duplicate in another location; you leave the original untouched. To copy a directory: 1. cp -r /home/ejr/Projects /home/ shared/deb/Projects At the shell prompt, type cp -r, followed by the old and new (to be created) directory names, to copy a complete directory. The r stands for “recursive,” if that’ll help you remember it. 2. 3). 3 Use cp -r to copy directories. Using Directories and Files To copy a file: $ cp existingfile newfile 1.
This process, in which you connect the output of one program to the input of another, is called piping. Depending on what you want to do, you can pipe together as many commands as you want—with the output of each command acting as the input of the next. 7 shows, you pipe commands together using the pipe symbol, which is the | character. In the following example, we’ll pipe the output of the ls command (which lists the contents of a directory) to the more command (which lets you read results one screen at a time).
Ls -l file* Optionally, verify that the file was created by typing ls –l file*. 2, you’ll see the name of the new file as well as its length (0) and the date and time of its creation (likely seconds before the current time, if you’re following along). Tips You can also use touch to update an existing file’s date and time. For example, typing touch -t 12312359 oldfile at the prompt would update oldfile with a date of December 31, 23 hours, and 59 minutes in the current year. years. eve to the same time in the year 2010.