Midterm Flashcards by Fender Legaspi

Reasons for Using Text editors in Linux

Scripts are written in text editors.

Many Linux programs use text-based data files for input.

Many of Linux-operating system services use configuration files that are text-based.

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It has Advanced DataPilot technology that makes it easy to pull in raw data from corporate databases, and then cross-tabulate, summarize, and convert it into meaningful information

Calc (Spreadsheet)

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3 modes of Vi editor

Command
Insert
Replace

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Comes with the Gnome desktop. It only runs in the GUI environment.

Gedit

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It enables you to insert perfectly formatted mathematical and scientific formulas in your text documents, spreadsheets, presentations, and drawings.

Math (Formula Editing)

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It is an excellent package for producing technical drawings, brochures, posters, and many other documents

Draw (Vector graphics and Flowcharts)

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How to enter insert mode and return to command mode?

Press ESC

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How to create a file in Linux

vi sample.txt

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It has the Fontworks tool that lets you create attractive 2D and 3D images from text

Impress (Presentation)

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It provides native-support drivers from some of the most widely employed multi-user database engines

Base (Database)

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It has AutoComplete feature, which can suggest commonly-used words and phrases to complete what you have started typing, using the built-in dictionary and by scanning the documents you open.

Writer (Word Processing)

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Is the recommended image editor for the Linux platform

GIMP

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Is a native editor found in all Linux and Unix systems. They include an enhanced replacement called vim.

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Can be customized and extended with different modes, enabling it to be used like IDE for programming languages such Java or C. It has to be installed first.

Emacs

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The office suite for Linux.

LibreOffice

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Is a text editor designed for beginners.

Nano

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How to add text?

Press “i”

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How to save changes?

Press “ :w “

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Confirmation message when creating a new file?

“sample.txt” [New File]

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Confirmation message of the changes made when saved?

“sample.txt: [New] 1L

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Cursor command movement: h, j, l, k

H- Left arrow
J- Down arrow
L- Right arrow
K- Up arrow

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To the beginning of the current line

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To the first non-whitespace character on the current line

” ^ “

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To the end of the current line

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To the beginning of the next word or punctuation character

To the beginning of the next word, ignoring punctuation characters

One page down

Page down

One page up

Page up

To line number

numberG

To the last line of the file

This command moves the cursor to the end of the line before starting insert mode.

A command

How to insert a blank line between two (2) existing lines

o command

How to insert the line above the current line

O command

Deletes the current character

Deletes the current character and the next two (2) characters

Deletes the current line

Deletes the current line and the next four lines

5dd

Deletes from the current cursor position to the beginning of the next word

Deletes from the current cursor location to the end of the current line

Deletes from the current cursor location to the beginning of the line

From the current cursor location to the first non-whitespace character in the line

Deletes from the current line to the end of the file

Deletes from the current line to the twentieth line of the file

d20G

Copies the current line

Copies the current line and the next four lines

5yy

Copies from the current cursor position to the beginning of the next word

Copies from the current cursor location to the end of the current line

Copies from the current cursor location to the beginning of the line

Copies from the current cursor location to the first non-whitespace character in the line

Copies from the current line to the end of the file

Copies from the current line to the twentieth line of the file

y20G

It applies only to the owner of the file or directory; this will not impact the actions of other users

Owner

It applies only to the group that has been assigned to the file or directory; it will not affect the actions of other users.

Group

It applies to all other users on the system; this is the permission group that you want to watch the most

All Users

User can view the contents of the file.

Read

User can modify a file or directory.

Write

User can run a file or view the contents of a directory.

Execute

It displays user identity.

It allows you to modify the access rights of a file/directory.

chmod

It sets the default file permissions

umask

It allows you to temporarily become the superuser

It allows you to execute a command as another user.

sudo

It allows you to change a file’s ownership.

chown

It allows you to change a file’s group ownership

chgrp

It allows you to change a user’s password.

passwd

How to view permission settings?

ls command

Attribute of a regular file?

Attribute of a directory

Attribute of a symbolic link?

A character special file. This file type refers to a device that handles data as a stream of bytes, such as terminal or modem.

A block special file. This file type refers to a device that handles data in blocks, such as hard-drive or CD-ROM drive

It sets no restrictions on permissions

777

The file’s owner may read, write, and execute the file. All others may read and execute the file

755

The file’s owner may read, write, and execute the file. Others are not given any rights. This setting is useful for programs that only the owner may use and must be kept private from others.

700

All users may read and modify the file.

666

The owner may read and modify the file, while all others may only read the file. This is a common setting for data files that everybody may read, but only the owner may change.

644

The owner may read and modify the file. All others have no rights

600

Symbolic notation of the directory or file owner

Symbolic notation of the group owner

Symbolic notation of others

Symbolic notation for all

It allows execute permission for the owner.

u+x

Removes execute permission from the owner

u-x

It allows execute permission for the owner, group, and everyone else.

It removes the read and write permission from anyone besides the owner and group owner.

o-rw

It sets the group owner and anyone besides the owner to have read and write permission. It removes the execute permissions from the group owner and others.

go=rw

It adds execute permission for the owner and sets the permissions for the group and others to read and execute

u+x, go=rx