https://old.andunix.net/ 2026-06-03T22:32:09+00:00 https://old.andunix.net/ https://old.andunix.net/_media/favicon.ico text/html 2014-02-22T13:16:38+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/virtualbox/cli VBoxManage (The VirtualBox CLI) This is a online reference of the output of VBoxManage without options. Oracle VM VirtualBox Command Line Management Interface Version 4.2.16 (C) 2005-2013 Oracle Corporation All rights reserved. Usage: VBoxManage [<general option>] <command> text/html 2014-04-28T09:01:22+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/linux/debian/cleanup_packages 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: text/html 2014-04-28T08:07:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/cryptography/openssl/debug_server_certificate_from_client 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. text/html 2013-03-01T20:38:48+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/oracle/resize_instance 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: text/html 2013-03-01T20:24:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/oracle/rman Oracle: Recovery Manager Start Recovery Manager rman target / Delete Archive Logs Delete all archive logs but keep the last 45 days: DELETE ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE -45'; To remove archive logs older than 3 days without prompting, e.g. via cron, after backup run: text/html 2015-11-25T08:53:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/mac/make_your_mac_feel_home 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}\$")… text/html 2015-10-23T12:39:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/script/variables Shell Script Variables Last Character Get the last character of $a: ${a: -1} Remove Slash from the End of a Variable Remove a trailing slash from $a: a=${a%/} scripting bash sysadmin variable text/html 2018-09-19T12:34:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/script/compare_directories Compare directories For each of the directories, generate a digest file: find DIR -type f -exec shasum {} + | LC_ALL=C sort -d -k 2 > shasums.txt It's important to use LC_ALL=C and the option -d of sort, to get compareable results on different machines. text/html 2013-02-04T22:17:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/cryptography/plaintext 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 … text/html 2013-03-01T20:58:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/solaris/localeadm 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. text/html 2013-02-04T22:17:36+00:00 Anonymous (anonymous@undisclosed.example.com) https://old.andunix.net/info/solaris/exam_notes Notes for the Solaris 10 System Administration Exam (CX-310-200 & -202) I'm preparing myself for the two exams to achieve the Sun Certified System Administrator (SCSA) certification. This are my notes taken while studying the preparation books. Managing File Systems List Devices To list the system's devices, you can use the following commands: