Get ssh key fingerprint for comapring safely

SSh keys can be long and unwieldy to compare. Many platforms digest them to md5 formats for non disclosure such as github. This command will give you the digested fingerprint of an ssh key in linux / Mac. nJoy 😉

Get Days in a month from a bash script

Useful listing of days in a month to populate directories or run scripts for backing up getting the correct dates of days in a month and year.     YEAR=2020 MONTH=2 for DAY in $(DAYS=`cal $MONTH $YEAR | awk ‘NF {DAYS = $NF}; END {print DAYS}’` && seq -f ‘%02G’ $DAYS) ;do DATE=”$YEAR-$MONTH-$DAY” echo $DATE…

Automatically passing ssh password in scripts especially to ESX where passwordless ssh is hard

First you need to install sshpass. Ubuntu/Debian: apt-get install sshpass Fedora/CentOS: yum install sshpass Arch: pacman -S sshpass Example: sshpass -p “YOUR_PASSWORD” ssh -o StrictHostKeyChecking=no YOUR_USERNAME@SOME_SITE.COM Custom port example: sshpass -p “YOUR_PASSWORD” ssh -o StrictHostKeyChecking=no YOUR_USERNAME@SOME_SITE.COM:2400 from :   This works better for me though for sshfs: echo $mypassword | sshfs -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no user@host mountpoint -o workaround=rename…

fail to mount ntfs in BSD

[root@ftp /mnt/test]# ntfs-3g /dev/da10s1 /mnt/test fuse: failed to open fuse device: No such file or directory kldload fuse That’s a missing module needs loading. nJoy 😉

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 😉    

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 😉