Pocket Theories
http://pockettheories.com/dokuwiki/
2026-06-17T00:22:11+00:00Pocket Theories
http://pockettheories.com/dokuwiki/
http://pockettheories.com/dokuwiki/lib/exe/fetch.php?media=wiki:dokuwiki.svgtext/html2026-06-03T18:23:08+00:00reddy (reddy@undisclosed.example.com)selinux
http://pockettheories.com/dokuwiki/doku.php?id=selinux&rev=1780510988&do=diff
Check if SELinux is enabled with getenforce or sestatus.
Set it with setenforce enforcing or setenforcing 1.
Disable with setenforce permissive or setenforcing 0.
Creating own module
Files used
.te , Type Enforcement file
.fc , File Context filetext/html2026-06-01T20:04:24+00:00reddy (reddy@undisclosed.example.com)linux
http://pockettheories.com/dokuwiki/doku.php?id=linux&rev=1780344264&do=diff
Linux
Popular Topics
* bash
* bind
* chrony
* Docker
* diff
* FirewallD
* Git
* keepalive
* lxc
* mail
* rsync
* Samba
* SELinux
* SystemD Unit Files
* tuned
* ufw
* Vim
* VNC
Miscellaneous
Suppressing the Service Restart prompt for "apt install"
/etc/needrestart/needrestart.conf
$nrconf{verbosity} = 0;
$nrconf{restart} = 'a';
export DEBIAN_FRONTEND=noninteractive
export APT_LISTCHANGES_FRONTEND=none
export NEEDRESTART_MODE=a # default is "i"nteractive…text/html2026-05-19T18:13:42+00:00reddy (reddy@undisclosed.example.com)wishlist
http://pockettheories.com/dokuwiki/doku.php?id=wishlist&rev=1779214422&do=diff
Wish List
Daily case register
Healthcare practitioners in India have to maintain a Daily Case Register with the following columns:
* Serial Number
* Date
* Name of Patient
* Nature of Professional Services Rendered
* Fees Received
* Date of Receipttext/html2026-05-19T18:00:36+00:00reddy (reddy@undisclosed.example.com)start
http://pockettheories.com/dokuwiki/doku.php?id=start&rev=1779213636&do=diff
Pocket Theories
This page serves as a top-level page for this wiki.
* Interesting Stuff
Computer Hardware and Electronics
* Amazon Computer and Electronics Finds
* Restoring and Modding Old Computer Hardware
Software Administration
* Ansible
* Docker
* DokuWiki
* Grafana
* httpd (Apache)
* Kafka
* Linux
* MongoDB
* nginx
* OpenSSL
* Powershell
* Windows
Software Development
* Artificial Intelligence / Machine Learning
* git
*text/html2026-05-19T12:29:12+00:00reddy (reddy@undisclosed.example.com)kafka
http://pockettheories.com/dokuwiki/doku.php?id=kafka&rev=1779193752&do=diff
Kafka
Kafka Broker
Kafka (with ZooKeeper) in a VM
### Install JDK ###
JAVAVERSION=17
# For Ubuntu
sudo apt update
sudo apt install -y openjdk-${JAVAVERSION}-jdk net-tools
# For RedHat
sudo dnf install -y java-${JAVAVERSION}-openjdk net-tools
SCALA_VERSION=2.13
KAFKA_VERSION=3.7.1
DOWNLOAD_SITE=downloads.apache.org
#DOWNLOAD_SITE=archive.apache.org/dist
curl -OL https://${DOWNLOAD_SITE}/kafka/${KAFKA_VERSION}/kafka_${SCALA_VERSION}-${KAFKA_VERSION}.tgz
tar xzf kafka_${SCALA_VERSION}-${KAFKA…text/html2026-05-02T18:13:10+00:00reddy (reddy@undisclosed.example.com)git
http://pockettheories.com/dokuwiki/doku.php?id=git&rev=1777745590&do=diff
Git Remote Server
Setting up a git server is as easy as this...
# On the server
cd /usr/local/share
sudo mkdir mygitrepo
sudo useradd -d /usr/local/share/mygitrepo -c "Git repo user" gituser
sudo chown gituser mygitrepo
cd mygitrepo
sudo -u gituser mkdir myrepo1
sudo -u gituser git init --bare myrepo1
sudo passwd gituser
# On the client
mkdir project1
cd project1
touch dummyfile
git init
git add dummyfile
git commit -m "Initial commit"
git remote add origin ssh://gituser@myserver/usr/local/s…text/html2026-05-02T16:13:38+00:00reddy (reddy@undisclosed.example.com)lxc - created
http://pockettheories.com/dokuwiki/doku.php?id=lxc&rev=1777738418&do=diff
LXC Containers
Snippet for Debian/Ubuntu
sudo su -
apt install -y lxc lxc-templates
lxc-create -n mysrv1 -t download -- --dist ubuntu --release jammy --arch amd64
lxc-start -n mysrv1
lxc-attach -n mysrv1text/html2026-05-01T16:53:08+00:00reddy (reddy@undisclosed.example.com)slackbotwithbolt - created
http://pockettheories.com/dokuwiki/doku.php?id=slackbotwithbolt&rev=1777654388&do=diff
Slack Bot With Bolt
Within the Slack website
Go to api.slack.com , go to “Your Apps”, and “Create App”.
Enable Socket Mode, and in token add “connections::write”.
In the OAuth and Permissions tab, add the Bot Token Scopes. If you change these later, you will need to re-install the app to the workspace.