Bash

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
if hash __git_ps1 2>/dev/null;then echo '__git_ps1'; \
else echo 'no __git_ps1';fi

References

• Execute bash script from URL
• Bash/SQLPlus Input Redirect
• Bash/Eclipse Workspace
• Bash Script Structure
• Bash/Port/Forward
• Bash/Network
• Bash/Port
• Bash/CPU
• Bash/RAM