I am a new, working on RHEL5. I am a bit confused on file permissions. I want to know how the setuid, setgid and sticky bit works on linux. And what are the advantages of using these bits? Can anyone explain me the main concepts of using these permissions?
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Can someone explain the concepts of IPoIB and TCP over infiniband? I understand the overall concept and data rates provided by native infiniband, but dont quite understand how TCP and IPoIB fit in. Why do u need them and what do they do? What is the difference when someone says their network uses native IB, IPoIB or TCP with infiniband? Which one is better? I am not from a strong networking background, so it would be nice if you could elaborate.
View 4 Replies View RelatedFor example, in GDB we talk about breakpoints, watchpoints and core dumps etc. Similarly what are the 'must knows' in Valgrind?
P.S. I don't need any links to Valgrind manuals, I already have them.
Im a begineer and there are a lot of gui concepts that have enlightened as well as confused me.
Xserver, metacity, compiz. Is there a simple step guide that will help me understand the GUi concepts in a simple yet fast manner? (considering I am a newbie)
What skills or concepts would you include in these three areas of Perl?
Perl Automation Test
Perl Development
Network Scripts / Programming
Could you make it look like a course contents so that I can check out those topics for the above three broad subjects of Perl?
i have written some really basic loadable kernel modules. There are a couple of concepts that i'll like to get cleared.
In a tutorial, the Makefile was given as follows-
obj-m += try.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
I understand that -C option of 'make' changes the current directory to /lib/modules/$(shell uname -r)/build (which depends on my kernel).
Now, my question is why to change to that particular directory? Also M=$(PWD) will hold the dir where i have written the module. Why is it required? What does 'modules' at the end of that line indicate?
Q2> We need to include <linux/module.h> and <linux/kernel.h> in a module. If i am right, the module uses kernel headers for these definitions. But how does 'make' find these definitions.
Q3> We are planning to write a custom scheduler for linux kernel. cat /sys/block/sda/queue/scheduler gives us the currently loaded schedulers. How do we expose our scheduler to linux kernel so that we can use it by switching to it.
I have 2 ethernet cards but when I look at the Network configuration in "Hardware Tab" I have another acx wireless network. How to delete that because In my system Idon't have wireless card..probably installed before but want delete it now.
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then windows can ping server and resolve ip address and browsing Internet but can't ping [URL]... result is Request time out. ICMP already enabled in iptables.
i want to know what is use or benefit of using s and t permission?i have used them but could not understand its uses.please explain me with suitable example.Also tell me about umask command to flag on s and t.
View 1 Replies View RelatedI'm developing simple transaction switch using java socket programming and running operating system RHEL5.4 . Now it is completely done and working fine. So I have written the simple shell script to run it on background.
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how can we achive more than 8TB size for one LUN.?I am getting following error..
[root@storage ~]# mke2fs -j /dev/VG01/data
mke2fs 1.39 (29-May-2006)
mke2fs: Filesystem too large. No more than 2**31-1 blocks
(8TB using a blocksize of 4k) are currently supported.
I want to implement CBQ in my RHEL5 server so that i can manage my BW.
View 4 Replies View RelatedI have rhel5 running ok and windows7 running ok, and currently access both via grub (both os are on separate disks) I want to be able to switch between both without rebooting. xen is installed and working but I cannot configure windows to run as a guest as xen wants an iso or img file.
View 1 Replies View Relatedi wnt to know how to configure nat server in rhel 5 i have net on eth0 so hw can i share net on my lan through nat server
View 3 Replies View RelatedI am configuring apche on rhel5, I got default page successfully, and virtual page too, when I keep only one file index.html in virtual folder it goes well, that file opens correctly, but when I keep other html files except index.html server shows default page again.
View 2 Replies View Relatedhow to configure vsftp in my rhel5 server.
View 2 Replies View RelatedI installed RHEL 5.5 with Postfix & openldap. POSTFIX version-2.3.3 openldap-server-2.3.43-12.el5 How to combine ldap with postfix for authentication? How to compile postfix with LDAP and where is the source
View 1 Replies View RelatedI wonder if someone can shade alight on this problem,I have active subscription for rhel4 ES and trying to do a fresh install of rhel5,I was able to download rhel5.3 DVD image from redhat site,burnt it to a DVD but is not booting,i have so far tried on 2 different DVDs but both have failed. I have even downloaded and burnt 1 CD ISO image burnt it still failed.BIOS level is set to cd device first so no problem there,it works!
View 5 Replies View RelatedI'm trying to get RHEL5.3 booting on an IBM Blade off a SAN disk, but it refuses.Our storage is presented on LUN 1 as due to the IBM XIV SAN, we cannot use LUN 0 when presenting volumes. We believe that when the installer tries to configure the boot LUN, it expects to see it on LUN 0 but we can't use that. This leads to a problem where after installed Red Hat, it asks me to remove the CD and reboot, but doesn't load anything other than a cursor blinking at me on the monitor.I currently can't change the LUN ID on the SAN, so I've been trying to amend things to get it to work with no joy.
View 3 Replies View Relatedwhat is the process of updating rhel5.1 to rhel6
is there anything which need to done before creating yum repositry and simplly running yum update ?
I am trying to install RHEL5.5 server on Dell Optiplex 360. When its reached at "checking dependencies in packages selected for Installation" its hang. What should I do, I checked cables hardware etc... every thing looks ok.
View 7 Replies View RelatedThe DNS server configuration for CentOS and RHEL5 and the entries for the clients in its configuration files...
View 8 Replies View RelatedI am studying RHEL myself, not clear with following topics How to configure DNS slave server in RHEL 5 Whether named.rfc1912.zones file entry can be included in named.conf itslef,if not What is following entry means inside named.conf file
zone "." in{
type hint;
file "root.servers";
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I want to configure a PXE Install Server with RHEL5u3 64bit.
View 1 Replies View RelatedHow to check server usage (process and memory) for last 4months in RHEL5
View 3 Replies View RelatedMy RHEL5 server is sync with NTP server. But we dont want to follow Day light saving. Is there any option to disable it. Like in windows you can uncheck the option if you dont want to follow day light saving.?
View 3 Replies View RelatedI have a RHEL 5 system running vsftpd. If I do a put to the box, files larger than 1 GB fail around the 1 GB point. Smaller files don't have a problem. If I do a get from the box there is no problem. Both the FTP server and client are plugged into a Netgear switch. I'm trying to create an FTP server and web server so my friends and I can upload our vacation pictures. Ultimately I want my friends to be able to access my server. Right now I'm just trying to make it work between my two machines.
View 5 Replies View RelatedThe default value of Hugepagesize is 2m, I want to chang it to 16m, could anybody tell me how to do that?
$ grep Huge /proc/meminfo
HugePages_Total: 10240
HugePages_Free: 799
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I have configured web server now i want add additional web domain to my web server how can i add it.
View 2 Replies View RelatedI want install postfix on rhel5 please send me the configuration of
View 2 Replies View RelatedI want to install swat on rhel5. how to install it on rhel5.
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