Linux_Bash_Altiris.txt

Scripts for referance with linux
chmod u+x file_name provides permission to allow to be ran
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Network status script

#!/bin/bash
is_alive_ping()
{
  ping -c 1 $1 > /dev/null
  [ $? -eq 0 ] && echo Node with IP: $i is up.
}
#for i in 10.0.0{1..255} #for network scan
#for i in 10.0.0.12 #for single IP scan
do
is_alive_ping $i & disown
done

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If file installed on system

#!/bin/bash
echo "enter your package name"
read name
dpkg -s $name &> /dev/null
 if [ $? -ne 0 ]
      then
          echo "not installed"  
          sudo apt-get update
          sudo apt-get install $name
       else
          echo  "installed"
    fi
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System Info

#!/bin/bash
echo "Starting to run the script..."
# VARIABLE ASSIGNMENT
# Show hostname:
HOST=$(hostname)
# User executing the script:
CURRENTUSER=$(whoami)
# Current date:
CURRENTDATE=$(date +%F)
# Host IP address:
IPADDRESS=$(hostname -I | cut -d ' ' -f1)

# SHOW MESSAGES
echo "Today is $CURRENTDATE"
echo "Hostname: $HOST ($IPADDRESS)"
echo "User info for $CURRENTUSER:"
grep $CURRENTUSER /etc/passwd

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Check is a single port is open

#!/bin/bash
if timeout 5 bash -c '</dev/tcp/kernel.org/21>/dev/null' #/21> is port can be changed to any
then
  echo "Port is open"
else
  echo "Port is closed"
fi
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Check all open ports on a system

#!/bin/bash
hostname=10.0.0.12 #ip address of machine you want to scan
for port in {1..65535};do
2>/dev/null echo > /dev/tcp/$hostname/$port
if [ $? == 0 ]
 then
 {
 echo " $port is open"
 }
fi
done