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Added sheets for emacs and gpg

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This commit is contained in:
Bob Mottram 2013-08-29 11:38:22 +01:00
parent 437f191bf7
commit 02ab2e7b8d
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# Basic usage
Indent Select text then press TAB
Cut CTRL-w
Copy ALT-w
Paste CTRL-y
Search/Find CTRL-s
Replace ALT-% (ALT-SHIFT-5)
Save CTRL-x CTRL-s
Load/Open CTRL-x CTRL-f
Undo CTRL-x u
Highlight all text CTRL-x h
Directory listing CTRL-x d
Cancel a command ESC ESC ESC
Font size bigger CTRL-x CTRL-+
Font size smaller CTRL-x CTRL--
# Buffers
Split screen vertically CTRL-x 2
Split screen vertically with 5 row height CTRL-u 5 CTRL-x 2
Split screen horizontally CTRL-x 3
Split screen horizontally with 24 column width CTRL-u 24 CTRL-x 3
Revert to single screen CTRL-x 1
Hide the current screen CTRL-x 0
Kill the current screen CTRL-x k
Move to the next buffer CTRL-x O
Select a buffer CTRL-x b
Run command in the scratch buffer CTRL-x CTRL-e
# Other stuff
Open a shell ALT-x eshell
Goto a line number ALT-x goto-line
Word wrap ALT-x toggle-word-wrap
Spell checking ALT-x flyspell-mode
Line numbers ALT-x linum-mode
Toggle line wrap ALT-x visual-line-mode
Compile some code ALT-x compile
List packages ALT-x package-list-packages
# Sudoing within eshell
By default when using the sudo command within eshell you'll just
get "permission denied" messages. To overcome that type:
alias sudo '*sudo $*'
# Line numbers
To add line numbers and enable moving to a line with CTRL-l:
(global-set-key "\C-l" 'goto-line)
(add-hook 'find-file-hook (lambda () (linum-mode 1)))
# Org-mode
To begin org-mode ALT-x org-mode
Table column separator Vertical/pipe character
Reorganize table TAB
Section heading *
Open/collapse section TAB
Open/collapse All CTRL-TAB
Export in other file formats (eg HTML,PDF) CTRL-c CTRL-e
To make org-mode automatically wrap lines:
(add-hook 'org-mode-hook
'(lambda ()
(visual-line-mode 1)))

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# Create a key
gpg --gen-key
# Show keys
To list a summary of all keys
gpg --list-keys
To show your public key
gpg --armor --export
To show the fingerprint for a key
gpg --fingerprint KEY_ID
# Search for keys
gpg --search-keys 'user@emailaddress.com'
# To Encrypt a File
gpg --encrypt --recipient 'user@emailaddress.com' example.txt
# To Decrypt a File
gpg --output example.txt --decrypt example.txt.gpg
# Export keys
gpg --output ~/public_key.txt --armor --export KEY_ID
gpg --output ~/private_key.txt --armor --export-secret-key KEY_ID
Where KEY_ID is the 8 character GPG key ID.
Store these files to a safe location, such as a USB drive, then
remove the private key file.
shred -zu ~/private_key.txt
# Import keys
Retrieve the key files which you previously exported.
gpg --import ~/public_key.txt
gpg --allow-secret-key-import --import ~/private_key.txt
Then delete the private key file.
shred -zu ~/private_key.txt
# Revoke a key
Create a revocation certificate.
gpg --output ~/revoke.asc --gen-revoke KEY_ID
Where KEY_ID is the 8 character GPG key ID.
After creating the certificate import it.
gpg --import ~/revoke.asc
Then ensure that key servers know about the revokation.
gpg --send-keys KEY_ID
# Signing and Verifying files
If you're uploading files to launchpad you may also want to include
a GPG signature file.
gpg -ba filename
or if you need to specify a particular key:
gpg --default-key <key ID> -ba filename
This then produces a file with a .asc extension which can be uploaded.
If you need to set the default key more permanently then edit the
file ~/.gnupg/gpg.conf and set the default-key parameter.
To verify a downloaded file using its signature file.
gpg --verify filename.asc
# Signing Public Keys
Import the public key or retrieve it from a server.
gpg --keyserver <keyserver> --recv-keys <Key_ID>
Check its fingerprint against any previously stated value.
gpg --fingerprint <Key_ID>
Sign the key.
gpg --sign-key <Key_ID>
Upload the signed key to a server.
gpg --keyserver <keyserver> --send-key <Key_ID>
# Change the email address associated with a GPG key
gpg --edit-key <key ID>
adduid
Enter the new name and email address. You can then list the addresses with:
list
If you want to delete a previous email address first select it:
uid <list number>
Then delete it with:
deluid
To finish type:
save
Publish the key to a server:
gpg --send-keys <key ID>
# Creating Subkeys
Subkeys can be useful if you don't wish to have your main GPG key
installed on multiple machines. In this way you can keep your
master key safe and have subkeys with expiry periods or which may be
separately revoked installed on various machines. This avoids
generating entirely separate keys and so breaking any web of trust
which has been established.
gpg --edit-key <key ID>
At the prompt type:
addkey
Choose RSA (sign only), 4096 bits and select an expiry period.
Entropy will be gathered.
At the prompt type:
save
You can also repeat the procedure, but selecting RSA (encrypt only).
To remove the master key, leaving only the subkey/s in place:
gpg --export-secret-subkeys <subkey ID> > subkeys
gpg --export <key ID> > pubkeys
gpg --delete-secret-key <key ID>
Import the keys back.
gpg --import pubkeys subkeys
Verify the import.
gpg -K
Should show sec# instead of just sec.