Shell tutorial part 3: basic text manipulation скачать в хорошем качестве

Shell tutorial part 3: basic text manipulation

In this video we'll learn basic text editing and file manipulation using cat, touch, echo, diff, Emacs and Vim. ----------------------- Video content: 0:20 : cat |filename|. Prints the contents of |filename|. 0:46 : touch |filename|. Creates an empty file under the name |filename|. 1:11 : echo "|text|". Prints |text| on the screen. By using the greater-than sign followed by a filename, the text will be written into a new file under the given filename. By using two greater-than signs followed by a filename, the text will be written into an existing file under the given filename. 2:58 : diff |filename1| |filename2|. Compares the contents of the given files. By using the -y flag, the contents of the files will be printed side by side. 4:35 : emacs. A powerful text editor. Read the tutorial! 5:20 : vim |filename|. Opens the text editor vim on the given filename, if it is an existing file it will be opened for editing, it it isn't an existing file - one will be created, if vim is given the file-save command. Vim is a modal editor - it has two modes, the command mode, which is the default one and can also be accessed by pressing the Esc key, and the insert mode, which can be accessed by pressing the 'i' key. Vim has a cursor that can be moved using the arrow keys and the mouse. 7:24 : :w. This command tells vim to save all changes made thus far. 7:47 : :q. This commands exits vim. Note that if the currently edited file has any unsaved changes, one needs to use :q! to exit vim. 8:30 : /|text-to-search|. This command searches the currently edited file for the text |text-to-search|. By pressing the Enter key and then the 'n' key, it is possible to advance the search to the next occurrence of |text-to-search| in the currently edited file. 9:10 : :vsplit. Splits the vim screen, allowing either editing two different parts of the same file, or two different files. By pressing Ctrl+w, followed by one of the arrow keys, it is possible to move to the vim screen in that direction; for example, to move to the right screen - press Ctrl+w followed by the right arrow key. 11:17 : v. This command tells vim to enter the "visual" mode, which allows selecting text using the arrow keys. The Esc key exits visual mode. 11:50 : Shift+v. This command tells vim to enter the "visual-line" mode, which allows selecting whole lines of text using the arrow keys. The Esc key exits visual mode. 12:08 : y. When vim is in visual mode, pressing 'y' copies the selected text. When out of visual mode, we can paste the copied text in the current cursor position by pressing the 'p' key. 13:05 : d. When vim is in visual mode, pressing 'd' cuts the selected text. When out of visual mode, we can paste the cut text in the current cursor position by pressing the 'p' key. Vim is very feature rich, read up on it! And, here is a nice cheat-sheet: https://vim.rtorr.com/ Fun fact: you can use vim to compare files, using "vim -d |file1| |file2|" to compare |file1| and |file2|, check it out! ----------------------- Relevant links: A very nice cheat-sheet for Vim (contains all the commands you need to know in a single page): https://vim.rtorr.com/ The complete getting started with the shell playlist:    • Getting started with the shell in Linux-ba...   The complete shell tutorial playlist:    • A short tutorial to using the command line...