'How to display /proc/meminfo in Megabytes?

I want to thank you for helping me my related issue. I know if I do a cat /proc/meminfo it will only display in kB. How can I display in MB? I really want to use cat or awk for this please.

shellunixterminaltext-processingunit-conversion


Solution 1:[1]

This will convert any kB lines to MB:

awk '$3=="kB"{$2=$2/1024;$3="MB"} 1' /proc/meminfo | column -t

This version converts to gigabytes:

awk '$3=="kB"{$2=$2/1024^2;$3="GB";} 1' /proc/meminfo | column -t

For completeness, this will convert to MB or GB as appropriate:

awk '$3=="kB"{if ($2>1024^2){$2=$2/1024^2;$3="GB";} else if ($2>1024){$2=$2/1024;$3="MB";}} 1' /proc/meminfo | column -t

Solution 2:[2]

You can use the numfmt tool

$ cat /proc/meminfo | numfmt --field 2 --from-unit=Ki --to-unit=Mi | sed 's/ kB/M/g'
MemTotal:          128692M
MemFree:           17759M
MemAvailable:      119792M
Buffers:            9724M
...
$ cat /proc/meminfo | numfmt --field 2 --from-unit=Ki --to=iec | sed 's/ kB//g'
MemTotal:            126G
MemFree:             18G
MemAvailable:        118G
Buffers:            9.5G
...
$ cat /proc/meminfo | numfmt --field 2 --from-unit=Ki --to-unit=Gi | sed 's/ kB/G/g'
MemTotal:             126G
MemFree:              18G
MemAvailable:         117G
Buffers:              10G
...

Solution 3:[3]

A single line bash entry for storing a memory quantity in MBs. This is for MemTotal but works for others like MemFree.

MEM_TOTAL_MB=`awk '/MemTotal/ {printf( "%d\n", $2 / 1024 )}' /proc/meminfo`

Notes:

backtick (`) and single quote (') are used.

replace %d with %.2f if you want to display as a float with 2 decimal level precision.

Solution 4:[4]

Putting together John1024's answer and tips from shane's answer into function:

if [ -f "/proc/meminfo" ]; then
  meminfo () {
    __meminfo=$(awk '$3=="kB"{if ($2>1024^2){$2=$2/1024^2;$3="GB";} else if ($2>1024){$2=$2/1024;$3="MB";}} 1' /proc/meminfo)
    echo "$__meminfo" | column -t;
    unset __meminfo;
  }
  HW_TOTALRAM=$(meminfo | awk '/MemTotal/ {printf "%.2f", $2; print $3}')
fi

meminfo function result

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1
Solution 2 phuclv
Solution 3 phuclv
Solution 4 PotatoFarmer

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