Monday, July 31, 2017

Get notification at specific time






Run below command in your terminal :

echo ' notify-send "Meeting with Munusamy in 5 minutes" ' | at 1:25PM



echo 'notify-send "Get your tea!"' | at now + 3 minutes

echo 'notify-send "Meeting in 1 hour with the big boss!"' | at 1pm tomorrow 



Commands used:
notify-send [OPTION...] <SUMMARY> [BODY] - create a notification

at and batch read commands from standard  input  or  a  specified  file
       which are to be executed at a later time, using /bin/sh.


source: https://superuser.com/questions/38654/pop-up-notification-when-time-reaches-400pm





Thursday, July 27, 2017

full screen mode in gvim editor



You need to set the following in your vimrc (mine is /etc/vimrc):



map <silent> <F11>
\    :call system("wmctrl -ir " . v:windowid . " -b toggle,fullscreen")<CR>



Also, you need to have this package installed:
sudo yum install wmctrl.x86_64 -y 


Friday, July 14, 2017

openshift - oc cluster up in specific address



When you do 'oc cluster up' , you can access openshift console using 127.0.0.1.

But if you wish to specify IP address to access your openshift console make use of --public-hostname=<IP address>

This way you can access the  cluster even from outside (but within LAN ofcourse)


# oc cluster up --public-hostname=192.168.122.152

Friday, July 7, 2017

Store and Run docker images locally



Store and Run docker images locally:


How to save image locally and use it:

// You have built an image named s3-store-build

// Now save locally
$ docker save s3-store-build > s3-store-build.tar

$ ls -ltrsh
261M -rw-rw-r--  s3-store-build.tar

// Load the image - ready to run:
$ docker load --input s3-store-build.tar

Push image to docker hub:

How to push image to docker hub:

# docker login


// build a image using Dockerfile in PWD
# docker build -t   store-build .


# docker images | grep store-build

# docker tag <db548e132e30> saran/store-build

# docker push  saran/store-build  

Thursday, July 6, 2017

Pulling docker images using url




Pulling docker images:

Generally, you pull a public URL like:

docker pull gluster/gluster-centos



Sometimes you want to directly pull the Docker image using URL:

docker pull https://hub.docker.com/r/gluster/gluster-centos/


The above can be any URL where Docker image present.