I have two questions on Linux's free command. Below, I have provided output from my home laptop (fedora 26 ) which has 16GB Physical RAM and a production server (RHEL 7.4) which has 24GB RAM.
Question1. What exactly does the buffer/cache column say in free command's output ? buffer/cache is only 1GB in my home laptop but it is 18GB in production server below.
Question2. To know the free RAM available to the system, Can I trust the 'available' column rather than the 'free' column ?
In my home laptop, the 'free' column shows 13GB and available shows 14GB
But, in my production server, when the free command shows just 2GB , the available command shows 9 GB
My Home Laptop with 16 GB RAM (Fedora 26)
A production Server (VM) with 24GB RAM (RHEL 7.4)
I know that free command displays memory usages however I like to know how the option and the results when I use this command..
PLease respond ASAP
thanx... I am a newbie.. :D (1 Reply)
Hi there again,
Running Solaris 10 with built-in Java. Seems to compile and run fine.
Problem is: Say I want to see contents of current directory. In a shell, I'd just write "ls" and it outputs the content.
When I write a Java file, I have the following line:
System.out.println("ls");
... (1 Reply)
Hi All
I have something that from the outset seems really trivial but in practice is not quite working.
I have the following code sample in my shell script which illustrates the problem
echo "enter home directory"
read home
mkdir $home/newdir
The user then enters a logical $HOME... (3 Replies)
hi all,
when I run-
wcars1j5#netstat -an | grep 8090
127.0.0.1.8090 *.* 0 0 49152 0 LISTEN
wcars1j5#
1. does this mean that no one is connected to this port?
Regards,
akash (1 Reply)
I am having trouble figuring this one out.....Is this a 2CPU or a 4CPU v490 with 16GB? I think it is a 2CPU system, looking for confirmation.
$ prtdiag
System Configuration: Sun Microsystems sun4u Sun Fire V490
System clock frequency: 150 MHz
Memory size: 16384 Megabytes
... (1 Reply)
Hello, I need some help to interpret the below output...
What is -/+ buffers/cache?
My understanding is, total RAM is 3986152 Bytes, used RAM is 3950904 bytes.
What is buffers and cached?? Can any one please interpret this output? It would be great help if some one can help me on this?
... (2 Replies)
Hi Friends,
I am really confused with the output of "free" command on redhat linux.
I can see caching and buffer output on two different areas on the output.
Please let me know whats the difference of these two different outputs.
Here I am pasting the command output of my server.
# free... (3 Replies)
Hi. I wonder what the equal sign in front of the answer means.
I have read man pages and googled but found no answer.
xntpdc -p
=15.5.64.3 15.5.2.51 3 512 377 0.02060 0.057426 0.04965Thanks.
Jan (1 Reply)
Hi All,
I have a file with name
Is there a LINUX command that will help me to output the word after the 9th Underscore(_).
ie the output should be DLY in this case.
Can anybody pls help me.
Thanks much in advance,
Freddie (4 Replies)
I wanted to know the concept of free -m command as there are different rows of Mem, -/+ buffers/cache & Swap in the output. As an example, it is showing 195 as free Mem in my server but 13850 in the free section of the -/+ buffers/cache row. The output needs in depth knowledge of the different... (7 Replies)
Discussion started by: RHCE
7 Replies
LEARN ABOUT DEBIAN
sysadmin
SYSADMIN(1) General Commands Manual SYSADMIN(1)NAME
sysadmin - responsible for everything imaginable that may or may not have to do with the system you're using. Contraction of "system" and
"administrator"
SYNOPSIS
sysadmin [-ab] [-cd] [-ef] etc......
DESCRIPTION
sysadmin takes care of everything, is generally harangued, must be supplied with coffee, chocolate, and alcohol in order to function prop-
erly, cannot be exposed to direct sunlight, and must not be allowed to have a life.
sysadmin is not intended as a user interface routine; other programs provide user-friendly front ends; sysadmin is used by everyone who can
track him [her] down.
With no flags, sysadmin reads its standard input up to an EOF, or a line which sysadmin wishes to parse, and then proceeds to ignore it
entirely and read news all day. When invoked with the -w option, sysadmin reads standard input and responds according to terms of job
description.
OPTIONS -bofh Go into Bastard Operator From Hell mode. This option causes sysadmin to use tools stored in the /usr/lib/bofh directory to parse
the standard input and route user tasks appropriately.
-cd causes sysadmin to become caffeine-deprived, resulting in system slowdowns.
-b causes the sysadmin to function normally while augmenting the standard input with beer(5). Can be used with the -t option as well,
depending upon which version of sysadmin you are running.
-t causes the sysadmin to smoke tobacco, which can result in significant performance improvement, provided you are running the correct
version of sysadmin.
-Cfile Specify an alternate configuration file (sysadmin.cf is the standard).
-dX set debuggin value to X.
-fFullname
Set the full name of the sysadmin.
-Bf Create the sysadmin.cf configuration freeze file.
-lname Sets the name of the "luser" person (that is, originator of a given request). -l can only be used by "trusted" users (who are listed
in sysadmin.cf).
NOTES
The -t option should not be used with a version of sysadmin which is not capable of parsing tobacco input. Though the functionality of
this command may seem similar to the -b option, it should not be confused with that or the related -c option.
25 September 1995 SYSADMIN(1)