linuxkathirvel

# Step 1
# Install Redis server
sudo apt-get install redis-server
# Please confirm with 'redis-cli ping' command. If that display 'PONG', it is working fine.

# Step 2
pip install celery redis

linuxkathirvel

# Enable auto completion in Debian bash
sudo apt-get install bash-completion

# Enable sudo group to existing user
sudo apt-get install sudo
adduser username sudo
Reference: https://wiki.debian.org/sudo

linuxkathirvel

import datetime

# strptime() is used for converting a string to a datetime object.
# strftime() is used for converting datetime object to formatted string

date_string = "2017-08-10 17:32:25"

# To convert as Python DateTime object
python_date_time_object = datetime.datetime.strptime(date_string, "%Y-%m-%d %H:%M:%S")

linuxkathirvel

Download Youtube Videos by start date and end date

youtube-dl -i --datebefore=20170901 --dateafter=20170101 https://www.youtube.com/user/periyartv/videos

linuxkathirvel

yum install https://download.postgresql.org/pub/repos/yum/9.3/redhat/rhel-7-x86_64/pgdg-redhat93-9.3-3.noarch.rpm
yum install postgresql93
yum install postgresql93-server

/usr/pgsql-9.3/bin/postgresql93-setup initdb
systemctl enable postgresql-9.3
systemctl start postgresql-9.3

linuxkathirvel

Install 'nslookup' in CentOS 7

sudo yum install bind-utils
nslookup gnutamil.blogspot.com

Shutdown linux machine

sudo shutdown -h now

linuxkathirvel

Add swap partition in CentOS7

1. Create new partition using fdisk /dev/sda with needed swap size
2. Change change partition type as LVM by partition code 8e using t option in fdisk
3. Save changes using w option
4. Reboot CentOS7
5. Create PV using pvcreate /dev/sdaX. 'X' will be newly created partition number.
6. Get VG name using vgdisplay
7. Extend VG size using vgextend centos /dev/sdaX
8. After extending VG size create Logical Volume using lvcreate centos -n swap -L 4G. Here, 'centos' in VG name and 'swap' is LV name

linuxkathirvel

postgres=# CREATE DATABASE confluencedb WITH ENCODING 'UNICODE' LC_COLLATE 'en_US.utf8' LC_CTYPE 'en_US.utf8' TEMPLATE template0;

linuxkathirvel

Enable swap in Linux

1. Uncomment swap entry in /etc/fstab file, if comment.
2. Run sudo mount -a; sudo swapon --all --verbose
3. Check with free -h command.

linuxkathirvel

Install python-ldap package in Ubuntu

sudo apt-get -y install libsasl2-dev python-dev libldap2-dev libssl-dev

https://stackoverflow.com/questions/4768446/i-cant-install-python-ldap