value of total physical memory in linux OS-CodePudding

I have a following question from this question. Is the value of the total physical memory always shown in KB? Because I would like to print it in GB and I use this command

grep MemTotal /proc/meminfo | awk '{$2=$2/(1024^2); print $2}'

I'm not sure wheter I should add a if statement to prove the command grep MemTotal /proc/meminfo showing KB value or other value

Any help would be appreciated

CodePudding user response：

Is the value of the total physical memory always shown in KB?

Yes, the unit kB is fixed in the kernel code. See: 1 and 2

CodePudding user response：

You need not to use grep awk, you could do this in a single awk itself. From explanation point of view, I have combined your attempted grep code within awk code itself. In awk program I am checking condition if 1st field is MemTotal: and 3rd field is kB then printing 2rd field's value in GB(taken from OP's attempted code itself).

awk '$1=="MemTotal:" && $3=="kB"{print $2/(1024^2)}' /proc/meminfo

OR if in case you want to make kB match in 3rd a case in-sensitive one then try following code:

awk '$1=="MemTotal:" && $3~/^[kK][bB]$/{print $2/(1024^2)}' /proc/meminfo