Ubuntu :: Understand The Output From 'free' Cmd?
Sep 20, 2010I don't understand the output from 'free' cmd.
[Code]....
WHy in first line in columns representing 'used', 'free', 'buffers', 'cached' are such values? I can't count them properly.
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Server :: Like To Understand Linux 'free' Command With Respect To Cache And Free Memory
Mar 27, 2010Was wondering if anyone can explain briefly the relationship of "cache" and free memory in the "free" memory command.
View 2 Replies View RelatedGeneral :: Not Able To Understand The Output Of W Command
Aug 9, 2011I have taken putty session of a server from two separate machines namely HOST1(3 sessions) and HOST2(1 Session) . However w command says there are 5 users
Code:
# w
09:29:36 up 34 days, 15:48, 5 users, load average: 0.62, 4.33, 8.16
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/17 HOST1 09:18 4:26 0.01s 0.01s -bash
root pts/18 HOST1 09:27 1:21 0.00s 0.00s -bash
root pts/21 HOST2 09:29 0.00s 0.00s 0.00s w
root pts/20 HOST1 09:29 1:39 0.00s 0.00s -bash
Fedora :: Unable To Connect To Homehub / Understand Trace Route Output
Sep 19, 2010I have be unable to access my bt homehub from another (external) ip address recently. I didtrace route to see what is happening to the connection and got the following.
It bounces around as it gets out my offices network and then seems to get to BT's servers and then I get stars. what that means?
1 - 8 bouncing round office network:
9 linx3.ukcore.bt.net (195.66.224.11) 19.405 ms 19.424 ms 19.381 ms
10 core2-pos0-1-5-0.ilford.ukcore.bt.net (62.6.201.121) 20.774 ms 21.099 ms 19.986 ms
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Server :: Understanding The Output Of "free"?
Jun 29, 2011I have a small server with following memory usage:
Code:
root@debian:~# free -m
total used free shared buffers cached
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Debian Configuration :: What Default Sources.list That Has Free And Non Free Etc For Squeeze
Jun 16, 2010During playing around sources, synaptic playing I messed up the default list. I know I should have been more careful. Anyways could someone tell me what the default the default sources.list that has free and non free etc for squueze please? I have been trying to get the default list but I cannot find it anywhere. There are alot of lists out there but nothing tagged like the "default" list.
View 6 Replies View RelatedServer :: Use System Monitor Via A VNC Connection The Free Disk Space Value Is 20GB Free On The Same Volume
May 18, 2011I've got a question on free disk space. I'm currently running CentOS 5.5 on in Xenserver virtual environment. We've had an issue with disk space. My question is as follows: - from a ssh connection i run df -h this gives the value of 90% used leaving me with 9GB. If I use system monitor via a VNC connection the free disk space value is 20GB free on the same volume. Which one is correct? I do use SNMP to monitor the same volume and should alert me when < 10% is free I know this works as I set the alert threshold to < 90% I get an alert.
View 2 Replies View RelatedUbuntu Installation :: FREE Support For FREE OS?
Jun 10, 2010Am I asking too much for a FREE OS? Everybody spend their precious time to help others, that's very helpful.But it seems like there is no support from UBUNTU team,how could we even get through the barrier of not using Microsoft's OSes? No free lunch of course, but it seems to me some issues have never really been solved.I read lot's of people have problem with their WIFI, not just for my OLD USB wifi adapter. I don't have problem with WIFI in XP/Server.
I posted here and there, and seems like no answer, and I do not get any reply from UBUNTU support team,forgive me if I run out of google's keywords.I just need a simple answer, is my WIFI going to work in UBUNTU with a layman effort? I like linux and UBUNTU had put great effort in providing me such a great OS, but if a basic internet connection will need to spent sooo much time to setup, and it still doesn't work. IS IT WORTH to switch to UBUNTU at all
Ubuntu :: Cant Understand Y There Is No Dock Option
Oct 19, 2010I cant understand y there is no dock option in this
View 4 Replies View RelatedUbuntu :: LAMP: Don't Understand How To FTP Localhost
Apr 19, 2011I'm in way over my head and have absolutely no idea what I am doing.I set up a lamp server earlier today on ubuntu 10.10 and I'm trying to upload files to wordpress which I installed at local host using vsftpd. I am so lost.Something about this entire process has not clicked in my head;
View 1 Replies View RelatedRed Hat :: Cannot Understand Working Of Yum
Dec 2, 2010I am a linux newbie (more so with using RedHat). I am trying to use yum to install packages, but have never really able to get this thing right. I want to install libXp-devel package. However, running yum install libXp-devel doesn't work.
When I downloaded the rpm for libXp-devel and tried to run yum install libXp-devel-1.0.0-8.1.el5.x86_64.rpm, I get the following:
Code:
Resolving Dependencies
--> Running transaction check
---> Package libXp-devel.x86_64 0:1.0.0-8.1.el5 set to be updated
--> Processing Dependency: libXp = 1.0.0-8.1.el5 for package: libXp-devel
--> Processing Dependency: libXau-devel for package: libXp-devel
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Ubuntu Servers :: How To Understand Log File Meaning?
Apr 13, 2010a lot of log file store in location /var/log/ but how to understand what the meaning in side the log file recorded down? how to find out the problem from the log file?
View 2 Replies View RelatedFedora :: Installing Free And Non-free Repositories?
Jan 28, 2011I've just installed Fedora 14 64bit and would like to add new repositories. I read here to do the following command (which as you can see doesn't works) :
Code:
$ su -c 'yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm'
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Fedora :: Can't Install Rpmfusion Free And Non-free
Jan 28, 2011I have installed F14 yesterday but i can not install rpmfusion repository, the problem is that i can not access the url [URL] so i cant download the files:
rpmfusion-free-release-stable.noarch.rpm
rpmfusion-nonfree-release-stable.noarch.rpm
Server :: How To Understand Different Timing Of CPU
Aug 23, 2010I am anticipating that someone could give more further information about that, not only simple explanations. How to understand User Time, sys time, wait time, idle time of CPU
View 1 Replies View RelatedUbuntu :: Positional Parameters Tutorial \ Don't Understand Its Concept?
Aug 14, 2010need help with the Positional Parameters. I don't understand its concept.If you could give some example or and explanation
View 2 Replies View RelatedOpenSUSE :: How To Understand System.time
Mar 29, 2011(inside R) I am using system.time function to measure the execution time of two functions
> system.time(lapply(seq(1:1000000),returni))
user system elapsed
0.982 0.100 1.057
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General :: Trying To Understand Where Bootloaders Are Installed
Apr 28, 2011In the beginning there is MBR. MBR looks for the active partition and tranfers control to the VBR of the active partition. MBR is where grub may be installed. which allows the user to choose an OS(a VBR) I am not sure what the program in the VBR does,but it manages to loads the OS. What am I trying to do: Backup. I ma tired of losign my partitions my bootloaders. I want to backup them all! partitions/MBR /VBR everything short of creating an disk image.
My questions:
1. say the ubuntu partition is formatted, will grub still load? if not is there a bootloader that would?am I making sense? i hope so...
2. what exactly does the VBR contain ?
2. How do I go about backing up? The mbr and the partiton table are backed up with a simple dd command. Then what else needs to be backed ? VBR's of every partition?
Server :: Can't Understand Logwatch Error
May 23, 2011This problem is occurring on Red Hat EL 5 WS. However, I have two CentOS 5 systems, with similar configuration to RH EL 5, where this problem does not occur.
I am getting this error:
Can't exec "sendmail": No such file or directory at ./0logwatch line 1018, <TESTFILE> line 1.
Can't execute sendmail -t: No such file or directory
Programming :: Programmers And People That Understand The OS?
Apr 24, 2011Well I get my other 2 questions answered , I have one last question that has been buggy me.Anyone know why windows use so many files just to keep the OS going and so bloated? The under line of files of windows is messy and loads self every where and very bloated with windows and windows vista and windows 7 very much so.I'm not sure if Linux /Mac OS X is like this or not .
I know windows needs to support alot more software and hardwar but is that not where drivers come in for the hardware.And programmers need to write the software for windows or Linux / Mac OS X.
Programming :: Can't Understand Return Value Of Gawk?
Mar 10, 2010I write a little script by bash.
#!/bin/bash
a=`gawk '/Iterations /{print $0}' hoge.log | gawk 'BEGIN{FS=" "}{print ($4)}'`
a=`expr 3 '*' $a`
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Programming :: Trying To Understand This Function In JavaScript
Dec 9, 2010In my book, this is an example of a recursive algorithm:
var reverseArray = function(x,indx,str) {
return indx == 0 ? str : reverseArray(x,--indx,(str+= " " + x[indx])) ;; }
var arr = new Array('apple','orange','peach','lime');
var str = reverseArray(arr,arr.length,"");
alert(str) ;
I'm trying to understand it, I'm stuck at the (str+= " " + x[indx])) part - that part of the function definition expects an ARGUMENT, am I right? What's being passed to it is a bit of PROGRAM, the str+= stuff. So - how is it working?
OpenSUSE Network :: How To Understand If I Have Been Hacked And Being Monitored
Oct 21, 2010make a check list of things to do to see if i can figure out if my machine is or not compromised .
View 9 Replies View RelatedProgramming :: Cannot Understand Invalid Read Error
Aug 25, 2010I have just started using Valgrind,which really is great. Most of the reported errors look kinda weird, though I can't really understand what's going on here, for example:
==00:00:02:52.033 7754== Invalid read of size 4
==00:00:02:52.033 7754== at 0x80B0987: MyCls::MyPrintf(long, char*, ...) (MyCls.cpp:270) ...
==00:00:02:52.033 7754== Address 0x47a5ee8 is 0 bytes after a block of size 296 alloc'd ...
==00:00:02:52.033 7754== by 0x809A6C1: ClsMain::taskRun(int, char**) (ClsMain.cpp:177)
==00:00:02:52.033 7754== by 0x816CFE8: main (main-C.cpp:2060)
==7754== ---- Attach to debugger ? --- [Return/N/n/Y/y/C/c] ---- Y
==00:00:02:57.410 7754== starting debugger with cmd: /usr/bin/gdb -nw /proc/7765/fd/1014 7765
GNU gdb Red Hat Linux (6.5-25.el5rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as
"i386-redhat-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1".
Attaching to program: /proc/7765/fd/1014, process 7765
MyCls::MyPrintf (this=0x47a5dc0, iPrm=3,
sMsg=0x6974320 "blablabla"...) at MyCls.cpp:270
270 cout<<endl<<"m_FilePtr="<<hex<<m_FilePtr<<dec<<endl;
Basically, Valgrind reported the "Invalid Read" error at line 270 of file MyCls.cpp, which is simply a cout of the m_FilePtr variable, which is a member variable of the MyCls class. It's a FILE* variable I use to write repeatedly on a text file. The address reported (0x47a5ee8) is 296 bytes after the "this" pointer (0x47a5dc0),as Valgrind correctly tells me but I honestly don't understand that. And of course, I need to read that variable, not only for the cout (indeed,the error is reported at every reading attempt). Besides, the application doesn't crash, but still I would like to understand if I really have to worry about this "error".
Ubuntu :: Understand A Large Amount Of Allocated Memory That Seems Not To Be Accounted For On System?
Mar 24, 2010I am trying to understand a large amount of allocated memory that seems not to be accounted for on my system.I'll say up front that I am discussing memory usage without cache and buffers, 'cause I know that misunderstanding comes up a lot.I am in a KDE 4.3 desktop (Kubuntu 9.10), using a number of java apps like Eclipse that tend to eat up a lot of memory.after a few days, even if I quit most apps, 1 gb of ram remains allocated (out of 2 gb).this appeared excessive, and I took the time to add up all values of the RES column in htop (for all users).the result was about 1/2 gb.am I trying to match the wrong values?or could some memory be allocated and not show up in the process list?this is the output of free
Code:
total used free shared buffers cached
Mem: 2055456 1940264 115192 0 123864 702900
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General :: Machine Check Exception - How To Read And Understand It
May 20, 2011My computer acts strange - sometimes reboots spontanousely, sometimes does not want to boot. When I isse command "mcelog", I receive such info:
[Code]..
How can I read and understand it? Could somebody point me to some documentation?
Networking :: Best Book To Understand Linux Network From Scratch
Mar 27, 2009i really confuse now..many people gave recommendation for many book.i have little experience on networking
what is the best book for understand Linux Networking from Scratch..
Server :: An Apache Tutorial Points To A Mistake But Could Not Understand It?
Jun 15, 2010Here is a link to atutorial which mentions following use of ReWriteRule is wrong.
Code:
RewriteEngine On
RewriteBase /
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Programming :: Unable To Understand The Highlighted Code/syntax?
Mar 4, 2011I am unable to understand the highlighted code/syntax here and what do variable names starting with an underscore represent?
Code:
#include <iostream>
template <class Class, typename ReturnType, typename Parameter>
[code]....
Programming :: Can't Understand The Value Returned By Semctl Using GETPID Option
Oct 18, 2010I have got a program using semctl(). I cant understand the value returned by semctl using GETPID option and its difference with the actual pid obtined by getpid()as in the following code:
Code:
int semid,retval;
semid=semget(0*20,1,0666 | IPC_CREAT);
retval = semctl(semid,0,GETPID,0);
[code]....
