Resizing a disk once the volume has grown on host in a VM (Ubuntu)

The disk will not automatically resize on many platforms once more disk space was made available. Particularly in Ubuntu 16.04 Rescanning the device for size maps : echo 1 > /sys/class/scsi_device/2\:0\:0\:0/device/rescan Then standard procedures to grow the fs apply. nJoy 😉    

Longevity and stability of sshfs

Just worth noting I hd many arguments with other sysadmins and bosses over the stability and validity of sshfs as a shortcut to creating a bridge for transferring files for backup or adhoc moves   The following is the result of an rsync from one sshfs mount to another (from ESXi servers I only had…

Using ngrok with React based websites

The problem : When we have a react.js based site (hosted on port 8000) and ngrok it for development purposes we get Invalid Host Header The fix is to override the header on reflection: ngrok http 8000 -host-header=”localhost:8000″   That’s it 😉 nJoy

Nginx setting to allow wss sockets to connect

General idea of the config https + proxy pass + virtual host Nginx as a proxy causes a failure of wss:// connections to the backend server. add these parameters to the proxy section :   proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection “upgrade”; proxy_set_header Host $host; Voila’  !!! 😉 nJoy  

OS doesn’t find en_US.UTF-8

test : perl -e exit perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LC_ALL = (unset), LANG = “en_US.UTF-8” are supported and installed on your system. perl: warning: Falling back to the standard locale (“C”).   Paste the following or add to server bash.rc : export LANGUAGE=en_US.UTF-8 export LC_ALL=en_US.UTF-8 export…

Clear Linux Cache

1. Clear PageCache only. # sync; echo 1 > /proc/sys/vm/drop_caches 2. Clear dentries and inodes. # sync; echo 2 > /proc/sys/vm/drop_caches 3. Clear PageCache, dentries and inodes. # sync; echo 3 > /proc/sys/vm/drop_caches nJoy 😉

Ubuntu Clean old kernel images

Be VERY CAREFUL with this.   sudo dpkg -l ‘linux-*’ | sed ‘/^ii/!d;/'”$(uname -r | sed “s/\(.*\)-\([^0-9]\+\)/\1/”)”‘/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d’ | xargs sudo apt-get -y purge 😉 nJoy

Install latest influxdb on Ubuntu

curl -sL https://repos.influxdata.com/influxdb.key | sudo apt-key add – source /etc/lsb-release echo “deb https://repos.influxdata.com/${DISTRIB_ID,,} ${DISTRIB_CODENAME} stable” | sudo tee /etc/apt/sources.list.d/influxdb.list sudo apt-get update && sudo apt-get install influxdb sudo service influxdb start nJoy 😉