How do I fix the GPG error “NO_PUBKEY”?
Teknologi / 25 September 2016

By far the simplest way to handle this now is with Y-PPA-Manager (which now integrates the launchpad-getkeys script with a graphical interface). To install it, first add the webupd8 repository for this program: sudo add-apt-repository ppa:webupd8team/y-ppa-manager Update your software list and install Y-PPA-Manager: sudo apt-get update sudo apt-get install y-ppa-manager Run y-ppa-manager (i.e. type y-ppa-manager then press enter key). When the main y-ppa-manager window appears, click on “Advanced.” From the list of advanced tasks, select “Try to import all missing GPG keys” and click OK. You’re done! As the warning dialog says when you start the operation, it may take quite a while (about 2 minutes for me) depending on how many PPA’s you have and the speed of your connection. (http://askubuntu[.]com/questions/13065/how-do-i-fix-the-gpg-error-no-pubkey)

APT-GET Error
Teknologi / 13 September 2016

Tips untuk mengasi error pada apt-get, dengan error message kurang lebih sbb: Reading package lists… Error! E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_trusty_main_i18n_Translation-en E: The package lists or status file could not be parsed or opened. Berikut adalah solusi atas permasalahan tersebut di atas: sudo rm /var/lib/apt/lists/* -vf sudo rm /var/lib/apt/lists/lock -vf sudo apt-get update Semoga bermanfaat!

Gagal Download Paket di Linux Mint dan Ubuntu
Teknologi / 30 November 2015

Pengalaman gagal install paket php5-cli dan php5-curl di Linux Mint (dan mestinya kasus yang sama dapat terjadi di Ubuntu juga), dengan error message seperti ini: Err http://security.ubuntu.com/ubuntu/ trusty-security/main libapache2-mod-php5 amd64 5.5.9+dfsg-1ubuntu4.14 Connection failed [IP: 91.189.88.149 80] Unable to correct missing packages. E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/p/php5/libapache2-mod-php5_5.5.9+dfsg-1ubuntu4.14_amd64.deb Connection failed [IP: 91.189.88.149 80] Ternyata permasalah itu terjadi akibat problem pada NAT. Solusinya adalah dengan IPv6. Berikut saya quote dari “ubuntuforums[dot]org”: Thanks doing now btw what is “Go IPv6 Now!: “sudo apt-get install miredo”, then visit www.test-ipv6.com and ipv6.google.com” about? It’s about IPv6. Do you know IPv6? It means a lot more IP addresses and it takes away NAT-problems. See http://en.wikipedia.org/wiki/IPv6. On Ubuntu it’s quite easy to take your first IPv6 steps: just that one command “sudo apt-get install miredo” Jadi solusi sangat mudah, tinggal install miredo saja: sudo apt-get install miredo Solved!

Fix apt-get 404 Not Found Package Errors
Teknologi / 3 September 2015

Posting ini copas dari https://smyl.es/how-to-fix-ubuntudebian-apt-get-404-not-found-package-repository-errors-saucy-raring-quantal-oneiric-natty/ If you’re using a normal version of Ubuntu such as Saucy, Raring, Quantal, Oneiric, Natty, Maverick, etc, you may have already (and will eventually) start getting “Failed to fetch 404 Not Found” errors when trying to run  apt–get update , or even sometimes running apt–get install , but fear not, it is easy to fix, and here’s how… Why am I getting this error? Normal Ubuntu releases are supported for 9 months, whereas LTS (Long Term Support) releases are supported for 5 years.  Once support is up for the version of Ubuntu you are using the repository is moved to another server and will no longer be available on the standard   http://archive.ubuntu.com/ubuntu/dist/ location. Ubuntu Release Details The most simple solution would be to upgrade to a newer version: sudo apt-get dist-upgrade BUT, for some of us that isn’t an option right now, or maybe you don’t want to upgrade.  With a simple sed command you can update the  /etc/apt/sources.list file to use the new location for the old package repository. How can I fix it without upgrading? Run this command below on your server and it will replace all of the  archive.ubuntu.com  and  security.ubuntu.com package repository URLs with  old–releases.ubuntu.com sudo sed -i…

Problem WiFii Pada Lenovo Yoga 2 Pro
Teknologi / 5 Juni 2014

Seminggu kemaren dapat mainan barun pengganti laptop jadul milik kantor. Walapun ada ketentuan dari kantor untuk tidak membuang OS bawaan “Windows 8.1”, namun dengan sedikit usaha meresize partisi dapat space kosong yang lumayan untuk pasang Ubuntu secara dualboot. Instalasi sangat lancar, namun masalah muncul karena di Ubuntu ga mau menghidupkan wifii dan alhasil koneksi internet terganggu 🙁 Coba-coba googling ketemu beberapa alternatif solusi. Berikut catatan kecil saya selama ngoprek mencari jalan menghidupkan wifii si Ubuntu: Alternatif 1 Melihat daftar device apa saja yang berstatus block/unblock juwarto@KOMPIEPAP:~$ rfkill list 0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: yes 1: ideapad_bluetooth: Bluetooth Soft blocked: yes Hard blocked: yes 2: phy0: Wireless LAN Soft blocked: no Hard blocked: no 3: hci0: Bluetooth Soft blocked: yes Hard blocked: no Membuka block (melakukan unblock) semua device juwarto@KOMPIEPAP:~$ rfkill unblock all Melihat kembali status device juwarto@KOMPIEPAP:~$ rfkill list 0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: yes 1: ideapad_bluetooth: Bluetooth Soft blocked: no Hard blocked: yes 2: phy0: Wireless LAN Soft blocked: no Hard blocked: no 3: hci0: Bluetooth Soft blocked: no Hard blocked: no Perintah unblock hanya bisa untuk software saja, sedangkan hardware tetap ter-block. Solusinya adalah mematikan module “ideapad_laptop” dengan cara: juwarto@KOMPIEPAP:~$…