User:Olenz

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Administration stuff

Granting SVN access to external users

Description: http://svnbook.red-bean.com/en/1.1/ch06s03.html

1. Get the public ssh key of the user.
2. Append the public ssh key to /home/svn/.ssh/authorized_keys.
3. Insert

   command="svnserve -r /home/svn/repos -t --tunnel-user=<user>",no-port-forwarding,no-agent-forwarding,no-X11-forwarding,no-pty

   before the key. Now the user can only execute the SVN command, and any other command will be ignored.
4. Commit the updated file to git: git commit -a

MySQL

• MySQL is running on elk
• For applications, allow access only from localhost
• Log in via mysql -u root -p
• MySQL commands:

# Create a user
CREATE USER <user> IDENTIFIED BY '<password>';

# Create a db
CREATE DATABASE <dbname>;

# Show grants
SHOW GRANTS FOR <user>@<host>;

# Grant full access on DB to user 
GRANT ALL ON <dbname>.* TO <user>@<host>;
# Example: Grant full access to user testwiki from localhost
GRANT ALL ON testwiki.* TO testwiki@localhost;

# Revoke access
REVOKE ALL ON testwiki.* FROM testwiki;

# Change Password
SET PASSWORD FOR 'bob'@'%.loc.gov' = PASSWORD('newpass');

Group Shared Directory

Make a directory group writable and all new files also (from [1])

setfacl -m d:u::rwx,d:g::rwx,d:m:rwx,d:o:r-x <dir>

Firefox Preferences and Presets

• Firefox generates a new profile from files in /usr/lib/firefox/defaults/profile [2]
  • e.g. bookmarks.html
• Default preferences for firefox are stored in /usr/lib/firefox/defaults/preferences/*.js: [3][4]
• Default preferences for all Mozilla apps are stored in /usr/lib/firefox/defaults/pref/*.js. However, as it is in the firefox lib dir, I assume that actually only firefox will read it.
• To limit the size of places.sqlite and urlclassifier.sqlite, set the preference urlclassifier.updatecachemax [5]
• Change default homepage: user_pref("browser.startup.homepage", "http://www.icp.uni-stuttgart.de") [6]
• Deactivate a plugin: [7]

Useful things

Useful things for LaTeX

Inside

• PDFLaTeX
  • can use PDF, JPG, PNG
  • use filename without extension!
  • use epstopdf to convert EPS
• graphicsdir
• empty lines are significant
• Difference between \\ and an empty line
• LaTeX 2.09 vs. LaTeX 2ε
  • \documentstyle → \documentclass
  • \it, \em, ... → \textit, \emph (Differences at the end!)
  • If anything, use \itshape
  • In general: prefer commands over declarations
• Koma-script classes
• Packages xspace, todonotes, inputenc, fontenc, lmodern, german/babel

Outside

• texdoc
• kpsewhich
• latexmk
• http://detexify.kirelabs.org/classify.html