Generate a Test Key

Anonymous (anonymous@undisclosed.example.com) — 2014-11-20T08:13:01+00:00

Generate a Test Key openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout testkey.key -out testkey.crt Informations about the used arguments from the OpenSSL man page: * req: PKCS#10 certificate request and certificate generating utility. * -x509: this option outputs a self signed certificate instead of a certificate request. This is typically used to generate a test certificate or a self signed root CA. The extensions added to the certificate (if any) are specified in the configurati…

Print all certificates in a file

Anonymous (anonymous@undisclosed.example.com) — 2013-02-18T14:27:02+00:00

Print all certificates in a file This command is especially helpful if you want to use Tomcat-/Java-Keystore-Certificates with the Apache webserver. Use the -print_certs to print all the certificates and then cut the file and store each certificate in a single file.

exiftool

Anonymous (anonymous@undisclosed.example.com) — 2016-09-26T19:25:34+00:00

exiftool Rename Photos Try it first with -testname: exiftool -d %Y-%m-%d_%H%M%S%%-c.%%e "-testname

Oracle: Resize Instance

Anonymous (anonymous@undisclosed.example.com) — 2013-03-01T20:38:48+00:00

Oracle: Resize Instance In this example, the SGA will be resized to 6GB and the PGA to 2GB. First, change the SPFile: ALTER SYSTEM SET pga_aggregate_target = 2G SCOPE=SPFILE; ALTER SYSTEM SET sga_target = 6G SCOPE=SPFILE; Then, (optionally) export the SPFile to a PFile:

Make your Mac feel at Home

Anonymous (anonymous@undisclosed.example.com) — 2015-11-25T08:53:11+00:00

Make your Mac feel at Home A small snippet from one of my scripts which tests whether your Mac is in the given (home) WLAN. # # Path to 'airport' executeable, as of Mac OS X 10.5. AIRPORT="/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport" # # Set this to your Home WLAN SSID (name): HOMESSID="mycastle" # # Get SSID info from 'airport' and search for $HOMESSID SSID=$(${AIRPORT} --getinfo | grep ' SSID:') SSID=$(echo ${SSID} | grep "^SSID: ${HOMESSID}\$")…

Clear DNS Cache

Anonymous (anonymous@undisclosed.example.com) — 2016-04-05T06:49:10+00:00

Clear DNS Cache To clear the DNS cache on OS X, you first have to flush the cache and then send a signal the the 'mDNSResponder'. dscacheutil -flushcache sudo killall -HUP mDNSResponder mac osx sysadmin dns cache cli

Plaintext

Anonymous (anonymous@undisclosed.example.com) — 2013-02-04T22:17:20+00:00

Plaintext The plaintext is unencrypted and unsigned text. It's the payload which then get's signed and/or encrypted. Wikipedia defines plaintext as: " In cryptography, plaintext is information a sender wishes to transmit to a receiver. Cleartext is often used as a synonym. Before the computer era, plaintext most commonly meant message text in the language of the communicating parties. Plaintext has reference to the operation of cryptographic algorithms, usually encryption algorithms, and is …

Virtual Network Visualization

Anonymous (anonymous@undisclosed.example.com) — 2013-02-04T22:17:36+00:00

Virtual Network Visualization OpenSolaris supports virtual networks using virtual interfaces connected with virtual switches. This feature was introduced with Project Crossbow in OpenSolaris 2009.06. To visualize the internal network(s), I created a perl script which takes the output of

Cleanup Packages

Anonymous (anonymous@undisclosed.example.com) — 2014-04-28T09:01:22+00:00

Cleanup Packages Purge uninstalled Packages If a package is removed, it is only uninstalled, but the configuration remains on the system. This is a good thing, as you are able to reinstall the package and have it configured with the old configuration. But if you want to cleanup this old stuff, you can ge a list of uninstalled (but not purged) packages with this command:

WiFi Config QR-Code

Anonymous (anonymous@undisclosed.example.com) — 2016-07-14T06:40:34+00:00

WiFi Config QR-Code To generate a qr-code for a wifi config, you must encode the following URL in the qr-code: WIFI:S:;T:;P:;; If the network is hidden, then add H:true;: WIFI:S:;T:;P:;H:true;; You can try it here:

pargs for Linux

Anonymous (anonymous@undisclosed.example.com) — 2014-04-28T09:01:02+00:00

pargs for Linux If you miss pargs from Solaris, then try this: ps eww -p linux sysadmin cli

localeadm

Anonymous (anonymous@undisclosed.example.com) — 2013-03-01T20:58:12+00:00

localeadm The localeadm utility queries and configures Solaris locales through a command line interface. * man page: localeadm(1M) Preparation Check your Solaris Release with cat /etc/release and get a matching DVD or ISO image. If you're using an ISO image, you have to mount it (insert your path in the first line.

Debug Server Certificate from Client

Anonymous (anonymous@undisclosed.example.com) — 2014-04-28T08:07:54+00:00

Debug Server Certificate from Client Credit for this example goes to “ Checking A Remote Certificate Chain With OpenSSL” from langui.sh. openssl s_client -showcerts -connect www.andunix.net:443 Informations about the used arguments from the OpenSSL man page: * s_client: SSL/TLS client program * -showcerts: display the whole server certificate chain: normally only the server certificate itself is displayed.

rmdir for OSX

Anonymous (anonymous@undisclosed.example.com) — 2015-11-25T09:43:44+00:00

rmdir for OSX The Finder on OSX creates .DS_Store files in the directories to store its settings. This makes removing directories from the command line quite complicated: $ rmdir test rmdir: test: Directory not empty $ rm test/.DS_Store $ /bin/rmdir test