Author: Ashutosh Narayan Jha

Create sudo user in centos linux

I followed following steps to add a new user and later gave it sudo privilege. Use adduser command to add a new user or if you already have a user to give sudo access skip adduser. Its syntax is ‘adduser usernmae’ [root@centos-10d ~]# adduser devlab Set a password for new user using passwd command [root@centos-10d
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Clear ssd cache in centos

I was adding a new user and received following error. [sss_cache] sysdb_domain_cache_connect: DB version too old [0.22], expected [0.23] for domain implicit_files!Higher version of database is expected!In order to upgrade the database, you must run SSSD.Removing cache files in /var/lib/sss/db should fix the issue, but note that removing cache files will also remove all of
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Uninstall node on ubuntu

To uninstall node js from ubuntu following steps can be done. $ apt-get remove nodejs # It will remove the package $ apt-get purge nodejs # It will remove configurations $ apt-get autoremove # It will remove unused file ashu@dev:~/work/sb/frontend$ sudo apt-get remove nodejsReading package lists… DoneBuilding dependency treeReading state information… DoneThe following packages were
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Virtualenv setup with python3

Project setup with virtualenv. While working with a pyhon3 project, it is better to install project based dependencies inside a project wise virtualenv created. It helps to minimise the interference of different versions of python modules into different projects.

Ubuntu screen recorder with audio- Obs-Studio

Ubuntu 20 have inbuilt recorder which we can be triggered by alt+ctrl+shift+ r But it does not record the voice to overcome the limitation I am exploring “OBS Studio” its installation steps are given at obsproject.com which I have used. Step 1) To check if “OpenGL” is available or not as OBS Studio needs openGL
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install sklearn for python3

I ran a python3 program and got error Traceback (most recent call last):File “main.py”, line 1, infrom sklearn.metrics.pairwise import pairwise_distancesModuleNotFoundError: No module named ‘sklearn’ It clearly says sklearn module is not available and second point to consider is I am using python3 and I have pyhton2 as well on my devbox. To sort it out,
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Pip3 Install pip for python3

I have Ubuntu20 and by default if I check pip version I get it is for python2 But I want to use pip for pyhon3 and if I check pip3 I get following: Therefore I executed above command to have pip3 for python3 at my system : It displays a bit general information and asks
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read N lines at a time file python

Here requirement is that, I want to process a file from row number N to row number N+X One solution might be, use itertools.islice to get the lines from the file between the given range of start and end.e.g for row no 3 to 6 : For example purpose I have take a file with
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UserWarning: Could not import the lzma module

Got following error after import turicreate /home/prod/anj/learn/ml/mlvenv/lib/python3.7/site-packages/pandas/compat/__init__.py:117: UserWarning: Could not import the lzma module. Your installed Python is incomplete. Attempting to use lzma compression will result in a RuntimeError. warnings.warn(msg) Fix: I have ubuntu: For it sudo apt-get install liblzma-dev Reading package lists... Done Building dependency tree Reading state information... Done Now I will go to
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