How to read total RAM in GBs?

Shell Programming and Scripting
1

I am aware of the commands to find the total RAM on Linux and Unix for example vmstat .

Can you please tell me which tool / command can give me the Total RAM reading in GBs [gigabytes] on Solaris Unix and Linux ?

2

There is a tool on Linux called numfmt :

$ wc -c < myfile | numfmt --to=iec
34M

Unfortunately it is not on Solaris to my knowledge. It is, however, part of the Gnu coreutils, so it may be possible to compile it from source.

Andrew

3

For good precision use awk.
Most handy is a shell function

kb_to_iec(){
awk '{
 if ($1<1024) {scale=1; unit="K"} else
 if ($1<1048576) {scale=1024; unit="M"} else
 if ($1<1073741824) {scale=1048576; unit="G"} else
 if ($1<1099511627776) {scale=1073741824; unit="T"} else
  {scale=1099511627776; unit="P"}
 printf "%.1f%s\n",$1/scale,unit
}'
}

echo 1023 | kb_to_iec
1023.0K
echo 1024 | kb_to_iec
1.0M