how can you create a file called history by using a redirection operator course hero

How can I create a history file using the redirection operator?

The command to use is cp spreadsheets/* accounts . How can you create a file called history by using a redirection operator? Type > history and press Enter. Wait one minute or more and then change the timestamp on the history file you just created. Type touch history and press Enter.

What is redirection in Linux?

Last Updated: 30 August 2019. Redirection is a feature in Linux such that when executing a command, you can change the standard input/output devices. The basic workflow of any Linux command is that it takes an input and give an output. The standard input (stdin) device is the keyboard.

How to copy DATA1 and Data2 files to the datafiles Directory?

Assume you have a subdirectory named datafiles directly under your current working directory. What command can you use to copy the data1 and data2 files from your current working directory to the datafiles directory? Type cp data1 data2 datafiles and press Enter.

How to make a file executable?

How to sort corp_phones1?

What command to use for spreadsheets?

Do two files have a common field?

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Chapter 4 Cumulative Review Flashcards | Quizlet

Study with Quizlet and memorize flashcards containing terms like The ____ option of the find command displays files that have been changed within the last n minutes., When you are moving files, using the -o option with the mv command can be a good idea so that you don't unexpectedly overwrite a destination file with the same name., Character special files are used by input/output devices for ...

Linux chapter 1-5 Midterm Flashcards | Quizlet

Study with Quizlet and memorize flashcards containing terms like Your boss drops by your office in a hurry to ask you to attend a meeting at 10:30 on Friday morning and you can't find a pen to make a note as a reminder. What Linux command can you use to make a quick note to store in a file called Meeting?, Before you make the note in Question 1, you decide to determine Friday's date, so that ...

How to make a file executable?

Make the file executable by using the chmod command. Next, run the file by typing ./ plus the name of the file.

How to sort corp_phones1?

Sort the corp_phones1 file by the last four digits of the phone number.

What command to use for spreadsheets?

The command to use is cp spreadsheets/* accounts .

Do two files have a common field?

The two files must have a common field, such as last name.

What is Redirection?

Redirection is a feature in Linux such that when executing a command, you can change the standard input/output devices. The basic workflow of any Linux command is that it takes an input and give an output.

What is the file descriptor for standard error?

The file descriptor for standard error is 2.

What is the file descriptor in Linux?

In Linux/Unix, everything is a file. Regular file, Directories, and even Devices are files. Every File has an associated number called File Descriptor (FD).

What is STDIN in computer?

The standard input (stdin) device is the keyboard.

Is a file descriptor always present?

These files are always present whenever a program is run. As explained before a file descriptor, is associated with each of these files.

Do you want error messages when you run a shell script?

While executing shell scripts, you often do NOT want error messages cluttering up the normal program output.

Can you redirect standard output to a device?

You can redirect standard output, to not just files, but also devices! The cat command reads the file music.mp3 and sends the output to /dev/audio which is the audio device. If the sound configurations in your PC are correct, this command will play the file music.mp3.

How to create a history file?

Discovery Exercises – Chapter 4 1. How can you create a file called history by using a redirection operator ? >history 2. Wait one minute or more and then change the timestamp on the history file you just created. touch history 3. Back up the history file to the file history.bak. history >history.bak 4. Sort the corp_phones1 file by the last four digits of the phone number. sort –n –k3 corp_phones1 5. Create and use a command that displays only the last names and

What is file sharing?

of File Sharing File sharing is the act of someone making a copy of a file and sending it to another person. The method of sharing includes Internet peer to peer transfers, but also includes physical CD copies, emails, and mobile storage devices. Companies are justified in focusing on physical CD sales and online peer to peer file sharing, as their sales have potential to cause harm. Loss of sales is indeed what is happening. Consumers need to be more aware of the risks of file sharing. File sharing

What is peer to peer file sharing?

Peer to Peer File Sharing Have you ever heard of peer to peer file sharing technology or P2P? What is P2P? According to J.A Pouwelse. P. Garbacki and his article “The Bittorrent P2P File-Sharing System: Measurements and Analysis”, “P2P is the transfer of a digital file from one “peer” to another. “peer” refers to computer clients. This transfer can be as simple as the File Transfer Protocol (FTP), which transfer a file directly to a visitor’s personal computer through a server-hosted website (Pouwelse

What is Unix file permission?

File Management Paper – Unix® File Permissions Joe Guckiean POS/355 April 15, 2013 Bob O'Connor File Management Paper – Unix® File Permissions The name Unix® refers to a play on words rather than being an acronym. During the mid-1960 an operating system was developed at MIT that allowed multiple users to work on a system at any one time. It was called Multiplexed Information and Computing System (MULTICS). In the late 1960s, closer to 1970, a couple programmers at Bell Laboratories wrote

How to make a file executable?

Make the file executable by using the chmod command. Next, run the file by typing ./ plus the name of the file.

How to sort corp_phones1?

Sort the corp_phones1 file by the last four digits of the phone number.

What command to use for spreadsheets?

The command to use is cp spreadsheets/* accounts .

Do two files have a common field?

The two files must have a common field, such as last name.