Posted by jpluimers on 2017/04/21
For future research: opensuse – How to run my script after SuSE finished booting up? – Unix & Linux Stack Exchange
Reason? Want to show the output of this as the last boot sequence line:
hostname
ip route
echo
ip address | grep -w 'UP\|flags\|inet\|inet6'
echo more detailed info through "ip address" and "ip route"
cat /etc/resolv.conf | grep nameserver
–jeroen
Posted in *nix, *nix-tools, bash, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2017/04/12
Blank imageFlair
Hosting Grumpydev Imageflair locally ended with two issues left: an empty image and my wish to include more complete StackExchange bits like the current StackExchange flair does.
I thought fixing the empty image would take a rainy day. It actually took a few rainy hours.
The culprit is that I didn’t have the Microsoft Core Fonts for the Web installed. Which was no coincidence as the free download of those from Microsoft terminated in 2002. The upside is that because of their licenses, they are available as open source and most linux distributions have a script package that will download these fonts. OpenSuSE has fetchmsttfonts for this.
Alternatively, you can use the web.archive.org to download manually, but that’s a tad tedious. But if you love tedious: Free downloads – TrueType core fonts for the Web.
zypper install fetchmsttfonts
That installs the fonts in:
/usr/share/fonts/truetypeThe drawback of having fetchmsttfonts is that the original Microsoft versions of these fonts are downloaded from corefonts.sourceforge.net each time the fetchmsttfonts package is updated, potentially overwriting newer versions of the fonts in that directory. If you don’t want that, use the trick at (not yet archived at the WayBack machine) font handling – install fetchmsttfonts, copy fonts, rpm -e fethmsttfonts, copy fonts back.
Having the fonts installed, I thought the only thing I needed to fix were the multiple references in config.php from that pointed to Arial.TTF. I took the poor man’s approach and just did this being in the directory of config.php:
cp /usr/share/fonts/truetype/arial.ttf Arial.TTF
Filled Imageflair
That didn’t work either: still no text showed.
So I decided to run imageFlair.php from the command line after setting $imageflair_debug = true; in config.php which then resulted in all sorts of warnings like
PHP Warning: imagettftext(): Could not find/open font
After reading I decided to build a small php-gd.tester.php script containing phpinfo(); and gd_info showing these portions for PHP GD (non-relevant bits stripped):
| Additional .ini files parsed | /etc/php5/conf.d/ctype.ini, /etc/php5/conf.d/dom.ini, /etc/php5/conf.d/gd.ini, /etc/php5/conf.d/iconv.ini, /etc/php5/conf.d/json.ini, /etc/php5/conf.d/mysql.ini, /etc/php5/conf.d/mysqli.ini, /etc/php5/conf.d/pdo.ini, /etc/php5/conf.d/pdo_mysql.ini, /etc/php5/conf.d/pdo_sqlite.ini, /etc/php5/conf.d/sqlite3.ini, /etc/php5/conf.d/tokenizer.ini, /etc/php5/conf.d/xmlreader.ini, /etc/php5/conf.d/xmlwriter.ini |
| GD Support | enabled |
| GD headers Version | 2.1.1 |
| GD library Version | 2.1.1 |
| FreeType Support | enabled |
| FreeType Linkage | with freetype |
| FreeType Version | 2.6.3 |
| GIF Read Support | enabled |
| GIF Create Support | enabled |
| JPEG Support | enabled |
| libJPEG Version | 8 |
| PNG Support | enabled |
| libPNG Version | 1.6.21 |
| WBMP Support | enabled |
| XPM Support | enabled |
| libXpm Version | 30411 |
| XBM Support | enabled |
| WebP Support | enabled |
And the gd_info dump:
| <?php | |
| echo "<h1>gd_info</h1>"; | |
| $gdInfo = gd_info(); | |
| echo "<table>"; | |
| foreach($gdInfo as $key=>$value) { | |
| echo "<tbody>"; | |
| echo "<tr>"; | |
| echo "<td class='e'>" . $key . "</td>"; | |
| echo "<td class='v'>" . $value . "</td>"; | |
| echo "</tbody>"; | |
| } | |
| echo "</table>"; | |
| ?> |
| GD Version | 2.1.1 |
| FreeType Support | 1 |
| FreeType Linkage | with freetype |
| T1Lib Support | |
| GIF Read Support | 1 |
| GIF Create Support | 1 |
| JPEG Support | 1 |
| PNG Support | 1 |
| WBMP Support | 1 |
| XPM Support | 1 |
| XBM Support | 1 |
| WebP Support | 1 |
| JIS-mapped Japanese Font Support |
Too bad though: no information on where it sources the fonts from.
Having no solution for the font rendering yet, I focussed at the lack of profile picture.
In the past, the images were generated with gravatar information in the JSON, but now that is empty. See for instance the output of http://superuser.com/users/flair/1.json versus his image http://superuser.com/users/flair/1.png
| { | |
| "id": 1, | |
| "gravatarHtml": { | |
| }, | |
| "profileUrl": "http:\/\/superuser.com\/users\/1\/jeff-atwood", | |
| "displayName": "Jeff Atwood", | |
| "reputation": "14,561", | |
| "badgeHtml": "<span title=\"24 gold badges\"><span class=\"badge1\">●<\/span><span class=\"badgecount\">24<\/span><\/span><span title=\"79 silver badges\"><span class=\"badge2\">●<\/span><span class=\"badgecount\">79<\/span><\/span><span title=\"109 bronze badges\"><span class=\"badge3\">●<\/span><span class=\"badgecount\">109<\/span><\/span>" | |
| } |
That reveals quite a change in the JSON that imageFlair expects. Actually there is a lot of HTML in there.
So decided to try http://superuser.com/users/flair/1 in addition to http://superuser.com/users/flair/1.json with this result:
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
| <style type="text/css"> | |
| .valuable-flair .userInfo .username a, .valuable-flair .mod-flair | |
| { | |
| color: #1086A4; | |
| } | |
| </style> | |
| <link rel="stylesheet" href="//sstatic.net/flair-Default.css" /> | |
| </head> | |
| <body> | |
| <div class="valuable-flair"> | |
| <div class="gravatar"> | |
| <a title="See my profile on Super User" target="_blank" href="http://superuser.com/users/1/jeff-atwood"><div class="gravatar-wrapper-50"><img src="https://www.gravatar.com/avatar/51d623f33f8b83095db84ff35e15dbe8?s=50&d=identicon&r=PG" alt="" width="50" height="50"></div></a> | |
| </div> | |
| <div class="userInfo"> | |
| <span class="username"><img src="http://superuser.com/favicon.ico" width="16" /><a href="http://superuser.com/users/1/jeff-atwood" target="_blank">Jeff Atwood</a><span class="mod-flair" title="moderator">♦</span></span> | |
| <br /> | |
| <span class="reputation-score" title="reputation score">14,561</span> | |
| <br /> | |
| <span title="24 gold badges"><span class="badge1">●</span><span class="badgecount">24</span></span><span title="79 silver badges"><span class="badge2">●</span><span class="badgecount">79</span></span><span title="109 bronze badges"><span class="badge3">●</span><span class="badgecount">109</span></span> | |
| </div> | |
| </div> | |
| </body> | |
| </html> |
Two downsides here:
Time for another rainy day (:
–jeroen
Posted in *nix, *nix-tools, bash, Development, Linux, openSuSE, PHP, Pingback, Power User, Scripting, Software Development, Stackoverflow, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2017/04/11
In order to scan some local networks for unknown hosts (yes, on some sites you need to perform archeology), I needed the local IPv4 addresses, netmasks and CIDRs on my Mac running OS X.
Part of that is using ifconfig to get local inet information which however uses hexadecimal network masks and delivers no CIDRs.
SoI was a bit premature when I wrote about “This could be done by creating bash functions mask2cdr and cdr2mask, but that’s a bit too convoluted right now” in Getting the IP addresses of gmail MX servers – via Super User – dig isn’t enough.
I need mask2cdr now, so lets start with these two bash functions and their aliases:
Posted in *nix, *nix-tools, Apple, bash, Development, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/04/07
Learned about the -www switch for ps: extra extra “unlimited” wide (a single -w gets you 132 columns).
ps auxwww
Actually, there is no need for www, ww just works:
–jeroen
Source: Starting a command with one more more spaces prevents it from going into the…
Posted in *nix, *nix-tools, Power User, ps | Leave a Comment »
Posted by jpluimers on 2017/04/05
A friend of mine made the mistake to capture some CDs using WMA files and throwing away the CDs. His old Nokia could play them, but not his new iOS and Android devices.
ffmeg and bash to the rescue:
find . -iname "*.wma" -execdir bash -c 'NAME="{}" && ffmpeg -y -i "$NAME" -ab 192k "${NAME/.wma/.mp3}" -map_metadata 0:s:0 && rm "$NAME"' \;
Tricks used:
Posted in *nix, *nix-tools, Audio, bash, bash, Development, ffmpeg, Media, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/03/20
Explains how to find out top 10 files and directories under Unix / Linux using sort and du command in human-readable format.
Interesting, especially
alias 'ducks=du -cks * | sort -rn | head'
Source: How Do I Find The Largest Top 10 Files and Directories On a Linux / UNIX / BSD?
via: Joe C. Hecht and nixCraft.
–jeroen
Posted in *nix, *nix-tools, Apple, BSD, Linux, Mac, Mac OS X / OS X / MacOS, Power User | Leave a Comment »
Posted by jpluimers on 2017/03/14
RegEx Fu
One of the things after moving most of my things from copy.com to Google Drive was the direct (public) download URLs that copy.com provides. DropBox has them as well, but Google Drive lacks them in the UI.
There is a URL format that does allow for direct download though:
While Google aims for Drive to be a competent Dropbox competitor, there’s one small but key feature that isn’t easy: sharing direct download links. Fortunately, you can create your own.
Source: Share Direct Links to Files in Google Drive and Skip the Web Viewer
You can do a similar replacement for Google Doc URLs: How to Create Direct Download Links for Files on Google Drive
The Google Drive conversion seems straightforward as they convert from either of
https://drive.google.com/file/d/FILE_ID/edit?usp=sharing
https://drive.google.com/file/d/FILE_ID/view
https://drive.google.com/open?id=FILE_ID
to
https://drive.google.com/uc?export=download&id=FILE_ID
There are tons of RegEx examples for doing the first conversion at Regex to modify Google Drive shared file URL – Stack Overflow, but
Since I’m a command-line person, I’ve opted for a sed conversion that wasn’t in the above list. I choose sed because it allows you to convert either a line or a complete file at one time.
There are a few indispensable resources to get my regex expressions right:
So here it goes, starting with fixing https://drive.google.com/open?id=FILE_ID as it’s the most simple replacement because the FILE_ID is at the end.
First of all, these code fragments below are part of bash functions as bash functions remove the quoting hell you have with bash aliases.
Where bash aliases have no parameters (i.e. the arguments are put after the end of the expansion), functions have parameters. So if you want to pass all function parameters to a command inside a function, you have to use “$@” to pass all parameters.
This fragment fixes https://drive.google.com/open?id=FILE_ID printing each fix on one line using the p for printing command in sed:
sed -n 's@https://drive.google.com/open?id=@https://drive.google.com/uc?export=download\&id=@p' "$@"
A few remarks:
& to \& as the ampersand has a special meaning in the replacement part of the sed expression: the “match” itself.The second fragment fixes https://drive.google.com/file/d/FILE_ID/edit?usp=sharing and https://drive.google.com/file/d/FILE_ID/view again printing each fix:
sed -n 's@https://drive.google.com/file/d/\([^.]*\)/.*@https://drive.google.com/uc?export=download\&id=\1@p' "$@"
Some more remarks:
\([^.]*\) and using the value in the replace with \1 as reference.\(.*?\) capturing group (sed can’t do that) but \([^.]*\)/ which matches any non-slash inside the capturing group until the first slash outside that group.The final part is combing both replacement into one sed command:
sed 's@https://drive.google.com/open?id=@https://drive.google.com/uc?export=download\&id=@;s@https://drive.google.com/file/d/\([^.]*\)/.*@https://drive.google.com/uc?export=download\&id=\1@' "$@"
Final remarks:
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, Power User, Scripting, sed, sed script, Software Development | Leave a Comment »
Posted by jpluimers on 2017/03/13
I hadn’t done a lot with pfSense in the past, which I regret a bit since I discovered this really cool feature: Sniffers, Packet Capture – PFSenseDocs.
The coolness isn’t so much that you can capture packets, but that it’s compatible with tcpdump and Wireshark (which has become available natively for Mac like 2 years ago).
Which means that you can download captures and open them in Wireshark.
So it’s as easy as 1,2,3:
–jeroen
Posted in *nix, *nix-tools, Internet, Monitoring, pfSense, Power User, routers, tcpdump, Wireshark | Leave a Comment »
Posted by jpluimers on 2017/03/07
Nice: “you can get both aliases and functions with compgen -a -A function”
It uses the compgen completion generator. Simply brilliant (:
Source: bash – how do I list the functions defined in my shell? – Stack Overflow
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/03/06
In case you manually want to configure or have a web-server that’s not supported by certbot for letsencrypt (yet): Generate Mozilla Security Recommended Web Server Configuration Files.
At the time of writing, these were supported by the generator (* were not supported by certbot for letsencrypt yet):
–jeroen
via: Feature request: admin web interface over HTTPS · Issue #630 · pi-hole/pi-hole
Posted in *nix, *nix-tools, Apache2, Encryption, Let's Encrypt (letsencrypt/certbot), Power User, Security | Leave a Comment »
The Wiert Corner - irregular stream of stuff 