Kirrus' BlogKirrus' Blog

Protected: Minddump April 2013

Kirrus — Tue, 16 Apr 2013 15:26:38 +0000

denying du partiton traversal

Kirrus — Thu, 14 Feb 2013 14:38:40 +0000

To make du not traverse partitons, just run it with the -x flag, or –one-file-system. Shiny.

(For the google meister, next time I search; du don’t follow partiton)

My friend Nick has also reminded me you can use the -x flag on cp as well, which is handy

Cook Me.

Kirrus — Tue, 04 Dec 2012 22:05:50 +0000

This is on my list of things to cook. Soon. Posting it here so I have *no* excuse. Instructions from a friend:

Visi: you should make the roast squash!
Visi: chop them in half, scrap out the seeds, score it with a grid, rub butter in, coat in salt and pepper and roast
Visi: put a lil bit of curry powder on near the end
Kirrus: temperature?
Visi: 180 I guess
Visi: whatever temperature you want!
Visi: takes a while but when you can shove a fork through it it’s done
Visi: *easily

Go (wéiqí, igo, baduk, cờ vây) opening

Kirrus — Sun, 09 Sep 2012 16:17:41 +0000

I’ve been playing Go a bit of late, and a friend was taught this about openings, during a review of a game on KGS. Posting it here mainly so I remember for the future!

Teofrostus [2k]: when you're playing go, there's a nice checklist that you should go through during the opening 

Teofrostus [2k]: it goes something like this 

Teofrostus [2k]: 1) Do I have any weak groups? 

Teofrostus [2k]: 2) Does my opponent? 

Teofrostus [2k]: 3) Are there any unapproached corners? [opponent corners before allied corners] 

Teofrostus [2k]: 4) Are there any "big points" left? 

Teofrostus [2k]: and you should respond to these in this order

Also worth noting:

Teofrostus [2k]:it's something that you should follow until you're like 3d

Quote of the Day

Kirrus — Sat, 21 Apr 2012 14:22:00 +0000

But in truth it had not exactly been gold, or even the promise of gold, but more like the fantasy of gold, the fairy dream that the gold is there, at the end of the rainbow, and will continue to be there for ever provided, naturally, that you don’t go and look.

This is known as Finance.

- Terry Pratchett

MySQL Linux CLI command execution

Kirrus — Thu, 15 Mar 2012 18:08:42 +0000

As another aid to my memory, you can run mysql commands on the command line like this:

mysql -u user -p[password] database -e "SELECT * FROM orders;".

You can also send the mysql client commands on stdin:

echo "SELECT * FROM orders" | mysql -u user -p[password] database

Or read them in with a file redirection

mysql -u user -p[password] database < /home/kirrus/orders.sql

That last one is really handy for reading MySQL dumps back into MySQL.

MySQL GRANT syntax oddity, show views

Kirrus — Wed, 22 Feb 2012 19:44:58 +0000

So that I don’t forget: Despite what the documentation says, being unclear (links always have an underscore over there, so it’s hard to tell difference between a linked underscore linked item, and one merely space-separated), you should grant ‘SHOW VIEW’, not ‘SHOW_VIEW’. Additionally, ‘SHOW VIEW’ really needs SELECT permissions as well.

Remember this: find recursion

Kirrus — Fri, 17 Feb 2012 18:31:37 +0000

I keep forgetting. To limit find’s recursion, use:

find . -maxdepth X

Where X is the recursion number. Maxdepth must be before any search selection stuff (type, name, mtime, perm etc).

Deleting lots of tiny files really really quickly

Kirrus — Fri, 03 Feb 2012 16:19:06 +0000

This is the second half of that magento issue. Mainly, after having got a directory with millions of files in it, you can do one of two things.

mv sessions sessions_full && mkdir sessions && chown www-data:www-data sessions

rm -rfv sessions_full

find /loc/of/sessions -ctime +1 -type f -exec rm -v {} \;

bind refuses to restart, debian squeeze

Kirrus — Thu, 02 Feb 2012 13:34:13 +0000

After an upgrade, I’ve noticed a few times that bind has refused to restart or reload, saying:

Stopping domain name service: namedrndc: connect failed: connection refused

This seems to be a permissions bug in debian, quite a long lasting one. In order to cheat-fix it quickly, I do the following:

chown bind:root /etc/bind/rndc.key

chmod 660

/etc/init.d/bind9 restart

That seems to fix it well enough. I think it’s a problem in that bind starts as one user, but runs as another. It may be that 440 are all the perms that are necessary. The debian bug report is here: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=169577