Research Tools Video 2 - Emacs part - More advanced emacs

http://youtu.be/P2Q_WL0h-mY

These notes are not complete.

At 0:40

http://www.gnu.org/s/libtool/manual/emacs/Dired.html

C-x C-f to open a file. That file can be a directory.

• d - flag for deletion
• x - delete all marked for deletion
• + - create a directory
• <RET> - Enter or return will open a file or go into the directory which the pointer is on
• C-x 2 - Split window
• C-x b - switch buffers At 3:30
• C-x o - jump to other buffer

At 4:20

Open up a terminal. Meta can be had by holding Alt or hitting ESC once.

• ls -la - List all the files with a long listing
• g - dired update directory
• Signals -> BREAK or C-c C-c at 6:25
• Signals -> KILL

At 6:38

• C-x 1 - hide all other buffers
• C-s - search
• C-g - quit
• M-x query-replace or M-% Swap text with new text, but ask each time
• M-x replace-string - Change text without asking

Completing with a tab key. Typing partial commands and being lazy

Capitalization at 8:45

• M-u - upper case
• M-l - lower case
• M-c - Capitalize a word
• M-% - Spell check a word
• C-space - start marking region
• M-x ispell-region - check the spelling of just a small region
• M-x ispell-buffer - check the whole file / buffer

At 11:30

Install the ERC chat client (for ubuntu 11.04)

sudo apt-get install erc

The research tools password: !rt2011vm

• M-x erc - start IRC inside of emacs
• irc.freenode.net is a common channel server
• in our the researchtools class, use: researchtools.ccom.nh
• Use port number 6667
• Make sure your username aka "nickname" is not researchtools!!!!
• No password, so press <RETURN>
• /join #unhresearchtools - Enter a chat channel
• Now just type text and press enter

For long pastes, use http://pastebin.com and put in the URL to a chunk of text you want others to see.

At 15:50

• C-x C-f sample.sh - You can have either ".sh" or ".bash". ".bash" would have been better!

The first line of a script. This makes sure that a copy of the bash shell gets started and then the rest of the file is passed to bash.

#!/bin/bash

The full initial script:

#!/bin/bash

# this is a comment

echo "Hello World"

17:20

File permissions - we need to make the script executable.

chmod +x sample.sh

You will now see the file marked as executable:

-rwxr-xr-x

We need to try running the script:

18:45

./sample.sh

#!/usr/bin/env python

print "Hello World from Python"

chmod +x sample.py

./sample.py

M-x speedbar

A helper to jump between files easily. Speed bar will update on its own unlike dired mode.

24:00

For chmod, setting the mode to 755 is the same as setting the file with +x.

M-x compile

M-x grep

grep -nH -e print *

Then C-x ` to jump to the next error. (or M-x next-error)