Kelvin's tech-box

Topic

linux

A collection of 29 issues

webdav setup

Today I want to setup the webdav service on my self-host server to be able sync the omniFocus data among my apple devices. I've already the default installed nginx service up on the server, the webdav modules are needed, and nginx-extras package contains the mod-http-dav-ext module, $ apt install

Kafka introduction

Why Kafka is fast? There're some majar reasons why Kafka is much faster than most of its competitors: 1. Avoid Random Disk Access Kafka writes everything onto the disk in order and consumers fetch data in the same order too. So disk access always works sequentially instead of

How did I use LXD to manage dev environment?

I've used LXD for a while when I worked for Canonical, it's really cool thing to create the isolated linux development environments. What is LXD? The main feature of LXD is that it provides the virtual machines similar functions by using and managing the linux containers.

Mail client Mutt configuration

Mutt is a powerful mail client on linux, especially when you work mostly with the terminal and want to use a terminal based mail client, mutt is a perfect match. sudo apt install libncurses-dev libncursesw5 libncursesw5-dev libsasl2-dev w3m libssl-dev ldd `which mutt` | grep curses Install Mutt Install mutt ./configure --enable-imap

GPG generate issue

When I run gpg --gen-key I got the following error message: Not enough random bytes available. Please do some other work to givethe OS a chance to collect more entropy! Soution: Open a new terminal and run find / > /dev/null This will help gpg key generation finish ASAP

Setup sftp server

Install packages kelvin@xenial:~$ sudo apt-get install openssh-server kelvin@xenial:~$ sudo groupadd sftpaccess kelvin@xenial:~$ sudo vim /etc/ssh/sshd_config Find and comment the below line Subsystem sftp /usr/lib/openssh/sftp-server Add these lines at the end of the file. Subsystem sftp internal-sftp Match group ftpaccess ChrootDirectory %h

Setup squid-deb-proxy on trusty

Why squid-deb-proxy? * No editing of files on the client side. * Use zeroconf so that clients were "zero config" * Use an existing, solid proxy solution instead of writing a new tool. * Easy to set up for a typical Linux administrator. Server Config sudo apt-get install squid-deb-proxy avahi-utils Now start

vim neocomplete issue

On my Mac, after I setup the Vim dev configuraion, usually I'd love to use http://vim.spf13.com/ to config all my plugins. Today I got the following warnings: "neocomplete does not work with this version of Vim. It requires Vim 7.3.885 or later

LUN iSCSI Config on Ubuntu

I setup a NAS at home, and I can attach a LUN iSCSI disk from NAS to the ubuntu laptop. After made some tryings, I got this work. Install the iscsi package $ sudo apt-get install open-iscsi Edit the config $ sudo vi /etc/iscsi/iscsid.conf line 53: uncomment node.session.

steps to work with the OpenStack instance via ssh

$ eval `ssh-agent -s`ssh-add` nova delete dev-trusty nova boot dev-trusty --flavor cpu4-ram8-disk50-ephemeral20 --image ddf5bd01-4926-40e3-a4c3-83a73f45554a --key_name kelvin_lcy02 nova add-secgroup dev-trusty custom-ssh nova show dev-trusty nova floating-ip-create nova floating-ip-list nova floating-ip-associate dev-trusty 162.2xx.x.xxx Find which version of the app installed on ubunut apt-cache policy ansible HOW to