sudo systemctl stop firewalld
sudo systemctl stop ipchains
sudo systemctl stop iptables
sudo systemctl restart jira
sudo systemctl restart atlbitbucket
# clear all
history -c
history -w
# delete line
history -d 2013
history -w
for i in {1..50};do \
history -d 2013;done;\
history -w
command -v __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}
hash __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}
type __git_ps1 >/dev/null 2>&1 || { echo >&2 "__git_ps1 not installed";}
# check by using if else conditional block
if hash __git_ps1 2>/dev/null;then echo '__git_ps1';\
else echo 'no __git_ps1';fi
Knowledge
sudo apt install neofetch
neofetch --cpu-brand off
neofetch
References