How to calculate used memory on Linux?

Hello

It seems you want to figure out the used memory rate.About /proc/meminfo you should know: this is not a real file. Instead, /proc/meminfo is a dummy file containing real-time dynamic information about the system. In particular, you need to check the following values: Total memory (MemTotal) Free memory (MemFree) Available memory (MemAvailable) Buffers File cache (Cached) SwapCached All swap areas (SwapTotal) SwapFree If you want to use /proc/meminfo, you can connect to the egrep command and use it: egrep --color'Mem | Cache | Swap'/proc/meminfo.This will produce an easy-to-read list with entries containing things like Mem, Cache and Swap will be colored.

Other commands to find that,top,free,vmstat -s and dmidecode may help you.But to use dmidecode command,you need to have sudo permission,then type in sudo dmidecode -t 17.The output of this command can be long because it displays information for all memory-type devices. Therefore, if you cannot scroll up and down, you may need to send the output of this command to a file,like sudo dmidecode -t 17> dmi_infoI or pass it to a less command, such as sudo dmidecode | less.

By the way,how do you export the red font?

Best wishes.

Shiroka

This is the /proc/meminfo output:

MemTotal:        3880364 kB
MemFree:          222412 kB
MemAvailable:    2666848 kB
Buffers:              28 kB
Cached:          1536256 kB
SwapCached:            0 kB
Active:          1341356 kB
Inactive:         758104 kB
Active(anon):     654492 kB
Inactive(anon):    38632 kB
Active(file):     686864 kB
Inactive(file):   719472 kB