mirror of git://git.qorg11.net/kill9.git
73 lines
2.5 KiB
Markdown
73 lines
2.5 KiB
Markdown
# Editing files on Emacs
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Emacs is a text editor. So its main function is to edit text. You can
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open a file with C-x C-f ```(find-file)``` and type the name of the
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file you want to open, for example:
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C-x C-f myfile
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That will create a buffer[^1] which your file's contents.
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There is another ways to visit a file in Emacs. for example:
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C-x C-r `(file-find-read-only)`: This will open a file but won't allow
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you to make changes on it.
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C-x 4 f `(find-file-other-window)`: This splits your Emacs window
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vertically and puts the selected file you gave on the buffer bellow
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C-x 5 f `(find-file-other-frame)`: This opens another Emacs window[^2]
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and puts the selected file on a new buffer.
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# Opening remote files
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Emacs comes with TRAMP which can be used to open remote files. To open
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a remote file. Press C-x C-f ```(find-file)``` and follow this syntax:
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~~~
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/method:host:filename
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/method:user@host:filename
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/method:user@host#port:filename
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~~~
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If you don't gave a method (put - as method) Emacs do the following:
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1. If `host` starts with ftp, Emacs will use ftp
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2. If `user` is "*ftp*" or "*anonymous*" Emacs will use ftp.
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3. If the variable `tramp-default-method` is ftp, Emacs will use ftp.
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4. If ssh-agent is running, Emacs will use ftp.
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5. Otherwise, Emacs will use ssh.
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Try opening this remote file: `ftp://test.rebex.net/readme.txt`
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To do this, press C-x C-f ```(find-file)``` and type this
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/ftp:demo@test.rebex.net:/readme.txt
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Emacs will ask for a password. This password is `password`
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This is a read only ftp server, but if it allowed write, you could
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write the remote file with C-x C-s `(save-buffer)`
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## Writing text
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To add text to a buffer, you just type what you want to add on the
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buffer, unlike Vi/Vim Emacs do not have an "INSERT" mode.
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When you finish typing and want to save what you have done press C-x C-s `(save-buffer)`
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## Reverting edits on Emacs
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Emacs, like every other text editor, allows to undo what you've done.
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If you have done massive changes to a file and want to revert it, type
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`M-x revert-buffer` Emacs will ask confirmation. Since this reverts to
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the saved version of the buffer. If you saved the file after some
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changes, this method will not work. You can undo your last change to
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the file with some shorcuts: C-x u, C-/ and C-_ `(undo)`
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[^1]: A buffer is where the text resides on your Emacs window,
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everything in Emacs is a buffer. In other words, a buffer holds
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your text file.
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[^2]: This is not a new Emacs run, it is called a "frame" These
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two emacs window shares the opened buffers.
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