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--- tech:app:start [2018/04/10 01:00]
rk4n3
+++ tech:app:start [2021/10/17 13:46] (current)
rk4n3
@@ Line 5: / Line 5: @@
 Create key for specific purpose or other user:<code>ssh-keygen -f keybasename -C "user@host"</code>
+==== GnuPG ====
+Encrypt:<code>gpg --encrypt -r keyid --armor < inputfile -o outputfile</code>
+Decrypt:<code>gpg --decrypt filename</code>
+List keys:<code>gpg --list-options "show-keyring" [--list-keys|--list-secret-keys]</code>
+Create key:<code>gpg --full-generate-key</code>
+Import keys:<code>gpg --import keyname_pub.asc
+gpg --allow-secret-key-import --import keyname_sec.asc</code>
+Export keys:<code>gpg --output keyname_pub.asc --armor --export keyid
+gpg --output keyname_sec.asc --armor --export-secret-key keyid</code>
+Delete keys:<code>gpg --delete-secret-keys XXKEYIDXX
+gpg --delete-keys XXKEYIDXX</code>
+Flush password cache:<code>echo RELOADAGENT | gpg-connect-agent</code>
+==== Vim ====
+Switch to hex mode: '':%!xxd'' \\
+Switch back from hex mode: '':%!xxd -r'' \\
+------
 ====== Technical Application Topics ======
@@ Line 55: / Line 73: @@
 ==== Home page for libfprint ====
 [[https://www.freedesktop.org/wiki/Software/fprint]]
+===== OpenSSL =====
+Here's a quick/easy self-signed SSL cert creation command:
+<WRAP prewrap><code>openssl req -new -x509 -keyout lighttpd.pem -out lighttpd.pem -days 365 -nodes</code></WRAP>
+Alternately, for a separate key & cert file:
+<WRAP prewrap><code>openssl req -newkey rsa:2048 -nodes -keyout yourapp.key -x509 -days 365 -out yourapp.pem</code></WRAP>
+===== apache =====
+==== SSL ====
+  * yum install mod_ssl
+  * On CentOS, edit ''/etc/httpd/conf.d/ssl.conf'' and:
+    * Comment out the SSL key file entry
+    * Ensure correct name of SSL cert file
+  * Remove password from PEM cert:<code>openssl rsa -in mycert.pem -out newcert.pem
+openssl x509 -in mycert.pem >> newcert.pem</code>
+  * On CentOS, put password-less PEM/OpenSSL cert file at ''/etc/pki/ssl/certs/localhost.pem''
+  * If you need to re-create the key from the PEM:<code>openssl rsa -in mycert.pem -out mycert.key</code>
+  * Restart apache
 ===== lighttpd =====
@@ Line 167: / Line 203: @@
 ... and then you would want to include that config file from the primary config file (''~lighttpd/etc/lighttpd.conf'') \\ ''include "lighttpd-hostname.conf"''
-==== SSL ====
+==== WordPress ====
-Here's a quick/easy self-signed SSL cert creation command:
+This re-write config should be populated into the vhost config:<WRAP prewrap><code>
-<code>openssl req -new -x509 -keyout lighttpd.pem -out lighttpd.pem -days 365 -nodes</code>
+url.rewrite-once = (
+"^/(wp-.+).*/?" => "$0",
+"^/(sitemap.xml)" => "$0",
+"^/(xmlrpc.php)" => "$0",
+"^/keyword/([A-Za-z_0-9\-]+)/?$" => "/index.php?keyword=$1",
+"^/.*?(\?.*)?$" => "/index.php$1"
+)</code></WRAP>
 ------
 ===== Snippets =====
+==== rsyslog: custom log file ====
+Add something like this into a ''/etc/rsyslog.d/myprogram.conf'' file:
+<code># Separate myprogram logging into its own file
+if $programname == 'myprogram' then /var/log/myprogram.log
+& stop</code>
+... then, something like ''logger -t myprogram "this is a log message"'' will get routed to the custom log file. \\
+PHP code to do the same:<code>
+   openlog( "myprogram", 0, LOG_LOCAL6);
+   syslog( LOG_NOTICE, "this is a log message");
+</code>
+Also, don't forget to add the custom log to ''logrotate'' by populating a file like ''/etc/logrotate.d/myprogram'' with:<code>
+/var/log/myprogram.log {
+   missingok
+   weekly
+   size 2G
+   copytruncate
+   rotate 12
+   notifempty
+}</code>
 ==== Ardour, Hydrogen & Jack under Windows ====
@@ Line 219: / Line 281: @@
 ==== Sendmail ====
+A useful reference:  [[https://www.ietf.org/rfc/rfc1912.txt|RFC 1912]] \\
+In particular, ''MX'' DNS records should not refer to ''CNAME'' records, only ''A'' records
 === Forwarding EMail: ===
 In order to forward mail using a ''.forward'' file, and when your home directory has to be group-writable, this ''sendmail'' option has to be specified in the configuration:
@@ Line 306: / Line 371: @@
 </code>
+==== Firefox ====
+=== Minimal browser window ===
+First, add a profile by launching firefox like:  ''firefox --new-instance -P profilename'' \\
+... and add a profile to suit the app you want to run in the minimal window. \\
+Open firefox using the profile, and go to ''about:config'' in the URL bar. \\
+Change the value of ''toolkit.legacyUserProfileCustomizations.stylesheets'' to true. \\
+Then, populate file ''$HOME/.mozilla/firefox/<profileid>.<profilename>/chrome/userChrome.css'' with: \\
+<code>
+/*
+ * Do not remove the @namespace line -- required to work
+ */
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */
+/*
+ * Hide tab bar, navigation bar and scrollbars
+ * !important may be added to force override, but not necessary
+ */
+#TabsToolbar {visibility: collapse; !important; }
+#navigator-toolbox {visibility: collapse; !important; }
+#content browser {margin-right: -14px; margin-bottom: -14px;}
+</code>
 ==== Vim ====

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