You are here

documentation

SCaLE17x MySQL track

SCaLE17x logo

SCaLE has a nice MySQL track this year. As usual, it is Friday. This year it’s in room 101.

Using uMatrix to replace NoScript

In the most recent episode of Free as in Freedom (ep 0x61) Bradley mentioned having trouble using NoScript with current web sites.

As a long-time fan of NoScript, I understand his frustration. Fortunately, there’s now uMatrix.

Comparing Strings in the Shell: Pattern Substitution Operator

One problem with using the truncate operator for string matching is case matching.

In the truncate operator example, ${foo%%*ATE} matches SENATE.


DALEK$ foo=SENATE
DALEK$ if [ '' = "${foo%%*ATE}" ] ; then echo "$foo! $foo!"; fi
SENATE! SENATE!
DALEK$

It will not match Senate because ate and ATE are different cases.


DALEK$ foo=Senate
DALEK$ if [ '' = "${foo%%*ATE}" ] ; then echo "$foo! $foo!"; fi
DALEK$

Comparing Strings in the Shell: Truncate Operator

While creating materials for my bash class I needed to create some globbing exercises for my students.

It occurred to me that a string operator and a comparison to the null string can be used to check if something is a substring of another value.

Sure, you can use Substring Expansion to see if the substring is at a known location such as "Does the value of $foo start with 'bar'?", but length and location are often unknown.


$ foo=barfood
$ if [ 'bar' = "${foo:0:3}" ]; then echo $foo; fi
barfood
$

LibrePlanet 2018 Experience

LibrePlanet, the Free Software Foundation's annual technology conference, was a great experience in March.

The conference started with a fantastic keynote from Deb Nicholson, "Free software forever."

Tübix Community Conference in Southern Germany

I went to my first Tübix this year. Tübingen is a beautiful college town ( Universitätsstadt ) on the Neckar river in southwestern Germany.

I particularly enjoyed the talks on SSH and authentication, both of which led into my talk on privacy and security via a password manager. I picked up a couple new ways of explaining things from the SSH talk and look forward to listening to it again.

PLUG July East Valley Meeting Wrapup

Thursday's PLUG meeting for July went well. We had a large crowd for mid-summer including lots of new faces.

Announcements included an opening for teaching electronics at a local community college. The department head showed up, so I handed it over to him for descriptions of the classes and what they need. He's adamant about a GNU/Linux infrastructure being vital to the success of the program and has hired 4 previous instructors from PLUG.

Online Privacy and Security Using a Password Manager

[This is an article I wrote for Linux Journal]

Internet and cloud companies do not have perfect security. We're all familiar with large scale data theft from big corporations. While most do a great job considering the attacks against them, you can do your part by protecting your own accounts.

It's common wisdom to use a different password for each account. Better yet is using a unique email address as well. That quickly becomes unwieldy, so we need an external brain.

Pages

Subscribe to RSS - documentation