Sunday, October 23, 2022

Creating Two Node Spark Cluster With Two Worker Nodes and One Master Node Using Spark's Standalone Resource Manager on Ubuntu machines 

1.1 Setting up Java

(base) ashish@ashishdesktop:~$ java
Command 'java' not found, but can be installed with:
sudo apt install default-jre              # version 2:1.11-72build2, or
sudo apt install openjdk-11-jre-headless  # version 11.0.16+8-0ubuntu1~22.04
sudo apt install openjdk-17-jre-headless  # version 17.0.3+7-0ubuntu0.22.04.1
sudo apt install openjdk-18-jre-headless  # version 18~36ea-1
sudo apt install openjdk-8-jre-headless   # version 8u312-b07-0ubuntu1

(base) ashish@ashishdesktop:~$ sudo apt install openjdk-8-jre-headless


1.2 Setting environment variable JAVA_HOME


(base) ashish@ashishdesktop:~$ readlink -f /usr/bin/java
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java

(base) ashish@ashishdesktop:~$ sudo nano ~/.bashrc
(base) ashish@ashishdesktop:~$ tail ~/.bashrc

        . "/home/ashish/anaconda3/etc/profile.d/conda.sh"
    else
        export PATH="/home/ashish/anaconda3/bin:$PATH"
    fi
fi
unset __conda_setup
# <<< conda initialize <<<

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64 

(base) ashish@ashishdesktop:~$ 

(base) ashish@ashishdesktop:~$ source ~/.bashrc
(base) ashish@ashishdesktop:~$ echo $JAVA_HOME
/usr/lib/jvm/java-8-openjdk-amd64


2. Setting up Scala


(base) ashish@ashishdesktop:~$ sudo apt-get install scala


3. Checking The Previous Standalone PySpark Installation on Laptop


(base) ashish@ashishlaptop:~$ pyspark
pyspark: command not found

(base) ashish@ashishlaptop:~$ conda activate mh
(mh) ashish@ashishlaptop:~$ pyspark
Python 3.9.0 | packaged by conda-forge | (default, Nov 26 2020, 07:57:39) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
22/10/22 22:45:46 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /__ / .__/\_,_/_/ /_/\_\   version 3.3.0
      /_/

Using Python version 3.9.0 (default, Nov 26 2020 07:57:39)
Spark context Web UI available at http://ashishlaptop:4040
Spark context available as 'sc' (master = local[*], app id = local-1666458948998).
SparkSession available as 'spark'.
>>> 



4. Download Spark Archive


One we are using: dlcdn.apache.org: spark-3.3.0-bin-hadoop3.tgz

Link to broader download site: spark.apache.org

In terminal:

$ wget https://dlcdn.apache.org/spark/spark-3.3.0/spark-3.3.0-bin-hadoop3.tgz


5. Setting up Spark From The Archive



5.1. Extracting the software from archive


(base) ashish@ashishlaptop:~/Desktop$ tar xvf spark-3.3.0-bin-hadoop3.tgz


5.2. Moving the software to the local installation directory


(base) ashish@ashishlaptop:~/Desktop$ sudo mv spark-3.3.0-bin-hadoop3 /usr/local/spark
[sudo] password for ashish: 

(base) ashish@ashishlaptop:~/Desktop$ cd /usr/local

(base) ashish@ashishlaptop:/usr/local$ ls -l
total 36
drwxr-xr-x  2 root   root   4096 Aug  9 17:18 bin
drwxr-xr-x  2 root   root   4096 Aug  9 17:18 etc
drwxr-xr-x  2 root   root   4096 Aug  9 17:18 games
drwxr-xr-x  2 root   root   4096 Aug  9 17:18 include
drwxr-xr-x  4 root   root   4096 Oct  8 11:10 lib
lrwxrwxrwx  1 root   root      9 Aug 26 09:40 man -> share/man
drwxr-xr-x  2 root   root   4096 Aug  9 17:18 sbin
drwxr-xr-x  7 root   root   4096 Aug  9 17:21 share
drwxr-xr-x 13 ashish ashish 4096 Jun 10 02:07 spark
drwxr-xr-x  2 root   root   4096 Aug  9 17:18 src

(base) ashish@ashishlaptop:/usr/local$ cd spark

(base) ashish@ashishlaptop:/usr/local/spark$ ls
bin  conf  data  examples  jars  kubernetes  LICENSE  licenses  NOTICE  python  R  README.md  RELEASE  sbin  yarn

(base) ashish@ashishlaptop:/usr/local/spark$ 


5.3. Including Spark binaries in the environment.


$ sudo gedit ~/.bashrc

(base) ashish@ashishlaptop:/usr/local/spark$ tail ~/.bashrc
        export PATH="/home/ashish/anaconda3/bin:$PATH"
    fi
fi
unset __conda_setup
# <<< conda initialize <<<

export PATH="/home/ashish/.local/bin:$PATH"
export JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"
export PATH="$PATH:/usr/local/spark/bin"

(base) ashish@ashishlaptop:/usr/local/spark$ source ~/.bashrc


6. Checking installation on laptop (and then on desktop after proper setup on it)



6.1. spark-shell (Scala based shell) on Laptop


(base) ashish@ashishlaptop:/usr/local/spark$ spark-shell
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
22/10/22 23:44:14 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Spark context Web UI available at http://ashishlaptop:4040
Spark context available as 'sc' (master = local[*], app id = local-1666462455694).
Spark session available as 'spark'.
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 3.3.0
      /_/
         
Using Scala version 2.12.15 (OpenJDK 64-Bit Server VM, Java 1.8.0_342)
Type in expressions to have them evaluated.
Type :help for more information.

scala> sys.exit


6.2. pyspark (Python based shell) on Laptop


(base) ashish@ashishlaptop:/usr/local/spark$ pyspark
Python 3.9.12 (main, Apr  5 2022, 06:56:58) 
[GCC 7.5.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
22/10/22 23:46:00 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /__ / .__/\_,_/_/ /_/\_\   version 3.3.0
      /_/

Using Python version 3.9.12 (main, Apr  5 2022 06:56:58)
Spark context Web UI available at http://ashishlaptop:4040
Spark context available as 'sc' (master = local[*], app id = local-1666462561785).
SparkSession available as 'spark'.
>>> exit()


6.3. spark-shell (Scala based shell) on Desktop


(base) ashish@ashishdesktop:~$ spark-shell
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
22/10/22 23:54:36 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Spark context Web UI available at http://ashishdesktop:4040
Spark context available as 'sc' (master = local[*], app id = local-1666463078583).
Spark session available as 'spark'.
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 3.3.0
      /_/
         
Using Scala version 2.12.15 (OpenJDK 64-Bit Server VM, Java 1.8.0_342)
Type in expressions to have them evaluated.
Type :help for more information.

scala> sys.exit


6.4. pyspark (Python based shell) on Desktop


(base) ashish@ashishdesktop:~$ pyspark
Python 3.9.7 (default, Sep 16 2021, 13:09:58) 
[GCC 7.5.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
22/10/22 23:55:07 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /__ / .__/\_,_/_/ /_/\_\   version 3.3.0
      /_/

Using Python version 3.9.7 (default, Sep 16 2021 13:09:58)
Spark context Web UI available at http://ashishdesktop:4040
Spark context available as 'sc' (master = local[*], app id = local-1666463110370).
SparkSession available as 'spark'.
>>> exit()
(base) ashish@ashishdesktop:~$ 


7. Configure Worker Nodes in Spark's Configuration


(base) ashish@ashishlaptop:/usr/local/spark/conf$ ls -l
total 36
-rw-r--r-- 1 ashish ashish 1105 Jun 10 02:07 fairscheduler.xml.template
-rw-r--r-- 1 ashish ashish 3350 Jun 10 02:07 log4j2.properties.template
-rw-r--r-- 1 ashish ashish 9141 Jun 10 02:07 metrics.properties.template
-rw-r--r-- 1 ashish ashish 1292 Jun 10 02:07 spark-defaults.conf.template
-rwxr-xr-x 1 ashish ashish 4506 Jun 10 02:07 spark-env.sh.template
-rw-r--r-- 1 ashish ashish  865 Jun 10 02:07 workers.template
(base) ashish@ashishlaptop:/usr/local/spark/conf$ 

(base) ashish@ashishlaptop:/usr/local/spark/conf$ cat workers.template 

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# A Spark Worker will be started on each of the machines listed below.
localhost 

(base) ashish@ashishlaptop:/usr/local/spark/conf$ 

(base) ashish@ashishlaptop:/usr/local/spark/conf$ cp workers.template workers
(base) ashish@ashishlaptop:/usr/local/spark/conf$ ls -l
total 40
-rw-r--r-- 1 ashish ashish 1105 Jun 10 02:07 fairscheduler.xml.template
-rw-r--r-- 1 ashish ashish 3350 Jun 10 02:07 log4j2.properties.template
-rw-r--r-- 1 ashish ashish 9141 Jun 10 02:07 metrics.properties.template
-rw-r--r-- 1 ashish ashish 1292 Jun 10 02:07 spark-defaults.conf.template
-rwxr-xr-x 1 ashish ashish 4506 Jun 10 02:07 spark-env.sh.template
-rw-r--r-- 1 ashish ashish  865 Jun 10 02:07 workers
-rw-r--r-- 1 ashish ashish  865 Oct 23 12:58 workers.template
(base) ashish@ashishlaptop:/usr/local/spark/conf$ nano workers
(base) ashish@ashishlaptop:/usr/local/spark/conf$ cat workers
ashishdesktop
ashishlaptop
(base) ashish@ashishlaptop:/usr/local/spark/conf$ 


(base) ashish@ashishlaptop:/usr/local/spark/conf$ cp spark-env.sh.template spark-env.sh


8. Starting Driver/Master and Worker Nodes Using Script 'start-all.sh'


(base) ashish@ashishlaptop:/usr/local/spark/sbin$ source start-all.sh
starting org.apache.spark.deploy.master.Master, logging to /usr/local/spark/logs/spark-ashish-org.apache.spark.deploy.master.Master-1-ashishlaptop.out
ashishlaptop: starting org.apache.spark.deploy.worker.Worker, logging to /usr/local/spark/logs/spark-ashish-org.apache.spark.deploy.worker.Worker-1-ashishlaptop.out
ashishdesktop: starting org.apache.spark.deploy.worker.Worker, logging to /usr/local/spark/logs/spark-ashish-org.apache.spark.deploy.worker.Worker-1-ashishdesktop.out

(base) ashish@ashishlaptop:/usr/local/spark/logs$ ls -l
total 12
-rw-rw-r-- 1 ashish ashish 2005 Oct 23 13:54 spark-ashish-org.apache.spark.deploy.master.Master-1-ashishlaptop.out
-rw-rw-r-- 1 ashish ashish 2340 Oct 23 13:47 spark-ashish-org.apache.spark.deploy.master.Master-1-ashishlaptop.out.1
-rw-rw-r-- 1 ashish ashish 2485 Oct 23 13:53 spark-ashish-org.apache.spark.deploy.worker.Worker-1-ashishlaptop.out
(base) ashish@ashishlaptop:/usr/local/spark/logs$ 


Master logs


(base) ashish@ashishlaptop:/usr/local/spark/logs$ cat spark-ashish-org.apache.spark.deploy.master.Master-1-ashishlaptop.out
Spark Command: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -cp /usr/local/spark/conf/:/usr/local/spark/jars/* -Xmx1g org.apache.spark.deploy.master.Master --host ashishlaptop --port 7077 --webui-port 8080
========================================
Using Spark's default log4j profile: org/apache/spark/log4j2-defaults.properties
22/10/23 13:53:51 INFO Master: Started daemon with process name: 9224@ashishlaptop
22/10/23 13:53:51 INFO SignalUtils: Registering signal handler for TERM
22/10/23 13:53:51 INFO SignalUtils: Registering signal handler for HUP
22/10/23 13:53:51 INFO SignalUtils: Registering signal handler for INT
22/10/23 13:53:51 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
22/10/23 13:53:51 INFO SecurityManager: Changing view acls to: ashish
22/10/23 13:53:51 INFO SecurityManager: Changing modify acls to: ashish
22/10/23 13:53:51 INFO SecurityManager: Changing view acls groups to: 
22/10/23 13:53:51 INFO SecurityManager: Changing modify acls groups to: 
22/10/23 13:53:51 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(ashish); groups with view permissions: Set(); users  with modify permissions: Set(ashish); groups with modify permissions: Set()
22/10/23 13:53:52 INFO Utils: Successfully started service 'sparkMaster' on port 7077.
22/10/23 13:53:52 INFO Master: Starting Spark master at spark://ashishlaptop:7077
22/10/23 13:53:52 INFO Master: Running Spark version 3.3.0
22/10/23 13:53:52 INFO Utils: Successfully started service 'MasterUI' on port 8080.
22/10/23 13:53:52 INFO MasterWebUI: Bound MasterWebUI to 0.0.0.0, and started at http://ashishlaptop:8080
22/10/23 13:53:53 INFO Master: I have been elected leader! New state: ALIVE
22/10/23 13:53:56 INFO Master: Registering worker 192.168.1.142:43143 with 4 cores, 10.6 GiB RAM
22/10/23 13:54:00 INFO Master: Registering worker 192.168.1.106:44471 with 2 cores, 1024.0 MiB RAM
(base) ashish@ashishlaptop:/usr/local/spark/logs$ 


Worker Logs From 'ashishlaptop'


(base) ashish@ashishlaptop:/usr/local/spark/logs$ cat spark-ashish-org.apache.spark.deploy.worker.Worker-1-ashishlaptop.out 
Spark Command: /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -cp /usr/local/spark/conf/:/usr/local/spark/jars/* -Xmx1g org.apache.spark.deploy.worker.Worker --webui-port 8081 spark://ashishlaptop:7077
========================================
Using Spark's default log4j profile: org/apache/spark/log4j2-defaults.properties
22/10/23 13:53:54 INFO Worker: Started daemon with process name: 9322@ashishlaptop
22/10/23 13:53:54 INFO SignalUtils: Registering signal handler for TERM
22/10/23 13:53:54 INFO SignalUtils: Registering signal handler for HUP
22/10/23 13:53:54 INFO SignalUtils: Registering signal handler for INT
22/10/23 13:53:55 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
22/10/23 13:53:55 INFO SecurityManager: Changing view acls to: ashish
22/10/23 13:53:55 INFO SecurityManager: Changing modify acls to: ashish
22/10/23 13:53:55 INFO SecurityManager: Changing view acls groups to: 
22/10/23 13:53:55 INFO SecurityManager: Changing modify acls groups to: 
22/10/23 13:53:55 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(ashish); groups with view permissions: Set(); users  with modify permissions: Set(ashish); groups with modify permissions: Set()
22/10/23 13:53:55 INFO Utils: Successfully started service 'sparkWorker' on port 43143.
22/10/23 13:53:55 INFO Worker: Worker decommissioning not enabled.
22/10/23 13:53:56 INFO Worker: Starting Spark worker 192.168.1.142:43143 with 4 cores, 10.6 GiB RAM
22/10/23 13:53:56 INFO Worker: Running Spark version 3.3.0
22/10/23 13:53:56 INFO Worker: Spark home: /usr/local/spark
22/10/23 13:53:56 INFO ResourceUtils: ==============================================================
22/10/23 13:53:56 INFO ResourceUtils: No custom resources configured for spark.worker.
22/10/23 13:53:56 INFO ResourceUtils: ==============================================================
22/10/23 13:53:56 INFO Utils: Successfully started service 'WorkerUI' on port 8081.
22/10/23 13:53:56 INFO WorkerWebUI: Bound WorkerWebUI to 0.0.0.0, and started at http://ashishlaptop:8081
22/10/23 13:53:56 INFO Worker: Connecting to master ashishlaptop:7077...
22/10/23 13:53:56 INFO TransportClientFactory: Successfully created connection to ashishlaptop/192.168.1.142:7077 after 46 ms (0 ms spent in bootstraps)
22/10/23 13:53:56 INFO Worker: Successfully registered with master spark://ashishlaptop:7077
(base) ashish@ashishlaptop:/usr/local/spark/logs$ 


Worker Logs From 'ashishdesktop'


(base) ashish@ashishdesktop:/usr/local/spark/logs$ cat spark-ashish-org.apache.spark.deploy.worker.Worker-1-ashishdesktop.out 
Spark Command: /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -cp /usr/local/spark/conf/:/usr/local/spark/jars/* -Xmx1g org.apache.spark.deploy.worker.Worker --webui-port 8081 spark://ashishlaptop:7077
========================================
Using Spark's default log4j profile: org/apache/spark/log4j2-defaults.properties
22/10/23 13:53:56 INFO Worker: Started daemon with process name: 19475@ashishdesktop
22/10/23 13:53:56 INFO SignalUtils: Registering signal handler for TERM
22/10/23 13:53:56 INFO SignalUtils: Registering signal handler for HUP
22/10/23 13:53:56 INFO SignalUtils: Registering signal handler for INT
22/10/23 13:53:57 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
22/10/23 13:53:57 INFO SecurityManager: Changing view acls to: ashish
22/10/23 13:53:57 INFO SecurityManager: Changing modify acls to: ashish
22/10/23 13:53:57 INFO SecurityManager: Changing view acls groups to: 
22/10/23 13:53:57 INFO SecurityManager: Changing modify acls groups to: 
22/10/23 13:53:57 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(ashish); groups with view permissions: Set(); users  with modify permissions: Set(ashish); groups with modify permissions: Set()
22/10/23 13:53:58 INFO Utils: Successfully started service 'sparkWorker' on port 44471.
22/10/23 13:53:58 INFO Worker: Worker decommissioning not enabled.
22/10/23 13:53:59 INFO Worker: Starting Spark worker 192.168.1.106:44471 with 2 cores, 1024.0 MiB RAM
22/10/23 13:53:59 INFO Worker: Running Spark version 3.3.0
22/10/23 13:53:59 INFO Worker: Spark home: /usr/local/spark
22/10/23 13:53:59 INFO ResourceUtils: ==============================================================
22/10/23 13:53:59 INFO ResourceUtils: No custom resources configured for spark.worker.
22/10/23 13:53:59 INFO ResourceUtils: ==============================================================
22/10/23 13:53:59 INFO Utils: Successfully started service 'WorkerUI' on port 8081.
22/10/23 13:54:00 INFO WorkerWebUI: Bound WorkerWebUI to 0.0.0.0, and started at http://ashishdesktop:8081
22/10/23 13:54:00 INFO Worker: Connecting to master ashishlaptop:7077...
22/10/23 13:54:00 INFO TransportClientFactory: Successfully created connection to ashishlaptop/192.168.1.142:7077 after 157 ms (0 ms spent in bootstraps)
22/10/23 13:54:00 INFO Worker: Successfully registered with master spark://ashishlaptop:7077


9. Issue Resolution



Prompt for password when launching worker nodes using script 'start-all.sh'



(base) ashish@ashishlaptop:/usr/local/spark/sbin$ source start-all.sh
starting org.apache.spark.deploy.master.Master, logging to /usr/local/spark/logs/spark-ashish-org.apache.spark.deploy.master.Master-1-ashishlaptop.out
ashishlaptop: Warning: Permanently added 'ashishlaptop' (ED25519) to the list of known hosts.
ashish@ashishlaptop's password: ashishdesktop: starting org.apache.spark.deploy.worker.Worker, logging to /usr/local/spark/logs/spark-ashish-org.apache.spark.deploy.worker.Worker-1-ashishdesktop.out

ashishlaptop: Connection closed by 192.168.1.142 port 22
(base) ashish@ashishlaptop:/usr/local/spark/sbin$


Debugging



DOING SSH FROM 'ASHISHLAPTOP' TO 'ASHISHLAPTOP' (NOT A TYPE) STILL RESULTS IN PASSWORD PROMPT.


(base) ashish@ashishlaptop:/usr/local/spark/conf$ ssh ashishlaptop
ashish@ashishlaptop's password: 


DO THIS TO RESOLVE THE ISSUE


(base) ashish@ashishlaptop:/usr/local/spark/conf$ ssh-copy-id -i ~/.ssh/id_rsa.pub ashish@ashishlaptop
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/ashish/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
ashish@ashishlaptop's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'ashish@ashishlaptop'"
and check to make sure that only the key(s) you wanted were added.

(base) ashish@ashishlaptop:/usr/local/spark/conf$ ssh ashish@ashishlaptop
Welcome to Ubuntu 22.04.1 LTS (GNU/Linux 5.15.0-52-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

9 updates can be applied immediately.
To see these additional updates run: apt list --upgradable

Last login: Sat Oct 22 22:00:44 2022 from 192.168.1.106
(base) ashish@ashishlaptop:~$ 


For more details on SSH setup: [ Link ]
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