Quots in Linux

Single and double Quots in Linux

In Double Quots "" $ value is takes the value of the variable
1. speaker=”marshal” assigned to speaker
echo $speaker it shows the output marshal
echo “I have got $speaker speaker recently.” $ is reads the variable value
I have got marshal speaker recently.

1. speaker=’marshal’ assigned to speake
echo ‘I have got $speaker speaker recently.’ $ is reads the variable value
I have got $speaker speaker recently. In single quot $ is read as a text

In some places you use $ as it is in double quots in such a case you use \$5 echo "world spending $5 billion for $virus"

1. Output of the command is stored in to the variable

       Back tick is the command is down to the esc button `` you kept in between the backtick             out=`uptime`
          This is two types we use
       1.Out=`uptime`
          Echo $out    it gives the uptime command output
        2.Out=$(uptime)
         Echo $out    it gives the uptime command output
          free -m | grep Mem | awk '{print $4}' This command gives the out put of 4th column
       FREE_RAM=` free -m | grep Mem | awk '{print $4}'` it stores the output of the the                    command in to that variable FREE_RAM to prin the output type echo $FREE_RAM to               give the output

1. Two know available df -h disc space of free size only by using the command by df -h | awk ‘{print $4}’ it shows the fourth column of free disc space