LinuxQuestions.org - [SOLVED] RAM Output

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- - RAM Output (https://www.linuxquestions.org/questions/linux-general-1/ram-output-4175444599/)

Hi:

I haven't been trained to read the output to the memory cmd.
Nor other cmds as well.

For now I am trying to calculate how much RAM I'm using and how much is free.
I wouldn't want to run the risk of installing VMware not have enought room for Puppy Linux and crash Fedora.

I see in this output that:

Code:

6083800 is being used and 1048012 is free and 5035788 is shared

I understand how the terminal calculated the amount of free RAM.
What I'm having an issue with is not knowing if the calculation is in kb's, mb's or gb's- Kilo bytes?

Code:

RAM OUTPUT

[redhat ~]$ free 

            total      used      free    shared    buffers    cached

Mem:      6083800    1048012    5035788          0      55532    337732

-/+ buffers/cache:    654748    5429052

Swap:      4194300          0    4194300

[redhat ~]$ free -m -t

            total      used      free    shared    buffers    cached

Mem:          5941      1023      4917          0        54        329

-/+ buffers/cache:        639      5301

Swap:        4095          0      4095

Total:      10037      1023      9013

[redhat ~]$ cat /proc/meminfo

MemTotal:        6083800 kB

MemFree:        5036020 kB

Buffers:          55532 kB

Cached:          337732 kB

SwapCached:            0 kB

Active:          525952 kB

Inactive:        314616 kB

Active(anon):    448240 kB

Inactive(anon):    5312 kB

Active(file):      77712 kB

Inactive(file):  309304 kB

Unevictable:          0 kB

Mlocked:              0 kB

SwapTotal:      4194300 kB

SwapFree:        4194300 kB

Dirty:              184 kB

Writeback:            0 kB

AnonPages:        447296 kB

Mapped:            84568 kB

Shmem:              6264 kB

Slab:              95232 kB

SReclaimable:      54964 kB

SUnreclaim:        40268 kB

KernelStack:        2576 kB

PageTables:        23020 kB

NFS_Unstable:          0 kB

Bounce:                0 kB

WritebackTmp:          0 kB

CommitLimit:    7236200 kB

Committed_AS:    1400576 kB

VmallocTotal:  34359738367 kB

VmallocUsed:      308080 kB

VmallocChunk:  34359426540 kB

HardwareCorrupted:    0 kB

AnonHugePages:    94208 kB

HugePages_Total:      0

HugePages_Free:        0

HugePages_Rsvd:        0

HugePages_Surp:        0

Hugepagesize:      2048 kB

DirectMap4k:      75776 kB

DirectMap2M:    6191104 kB

[redhat ~]$ grep 'MemTotal:' /proc/meminfo

I found these article's but they weren't so helpful-
http://linuxdevcenter.com/pub/a/linux/lpt/13_01.html
http://www.aboutlinux.info/2006/01/i...simple-in.html
http://www.unix.com/unix-advanced-ex...tput-file.html

Is there documentation for learning "How To"read terminal results/output?

Thanks in advance;)

Quote:

Originally Posted by Ztcoracat (Post 4865114)

What I'm having an issue with is not knowing if the calculation is in kb's, mb's or gb's- Kilo bytes?

Since the total free memory value from 'free' output looks convincingly similar to the MemTotal value from /proc/meminfo it would be odd if it wasn't in kB too ;-p 'man free' actually tells you that also, so that answers your "is there documentation" question as well (also see whatis, whereis, which, apropos, locate, man, info, /usr/share/doc).

Thanks UnSpawn;)

I followed the path you indicated; /usr/share/doc and I have approx. 115 files to go thru.

I specifically looked for a file that could be related to RAM, Memory or something to the nature.
The result of what I searched for in my file system was not found. I don't understand-

Are there files that are actually logs or system calls that I could learn from as to what I am looking at?

For example; this output is foreign to me:
-Shem
-Slab and -
-Kernel Stack ?

Run "free -m" and look at the number under "free" in the row "-/+ buffers/cache". That's your current available memory in MB. In your example output:

Code:

[redhat ~]$ free -m -t

            total      used      free    shared    buffers    cached

Mem:          5941      1023      4917          0        54        329

-/+ buffers/cache:        639      5301

Swap:        4095          0      4095

Total:      10037      1023      9013

You have 5301 MB available RAM out of your 5941 MB total.

suicidaleggroll:

Thanks for showing me specifically-

Code:

redhat ~]$ free -m

            total      used      free    shared    buffers    cached

Mem:          5941        917      5023          0        34        313

-/+ buffers/cache:        569      5371

Swap:        4095          0      4095

So, here I have 5941 total and 5371 free-
A difference of 570 yet the output indicates 569 used. Difference of 1 but why?

Just roundoff error most likely

Quote:

Originally Posted by Ztcoracat (Post 4865872)

I followed the path you indicated; /usr/share/doc and I have approx. 115 files to go thru.

It was a generic remark wrt how and where to find documentation. Like I already said 'man free' tells you the output default is in kB.

Got it; (kb) I understand now-:hattip:

Thank you both!