Red Hat :: Adding Newly Created LUNS Dynamically

Apr 13, 2010

We are running Oracle 10.2.04 RAC on Red Hat Linux 5 and when ever our SAN storage admin created new LUNS we have to reboot the servers so that server can see newly created LUNS. This causing downtime to our application. How we can add LUNS dynamically without rebooting servers. We are using device mapper mulitpath from red hat version 0.4.7-30.el5 and we have QLOGIC HBA's.

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Ubuntu Networking :: How To 'see' Dynamically Created Wpa_supplicant.config

Jan 26, 2011

I've got my laptop working with my UNI's rather complex wifi setup.

I need to get access to my wpa_supplicant file so i can use it with my nook and a few other devices that i need to get wifi access.

Network manager, i know, does all the wpa stuff dynamically and through scripts, so is there any way that i can get network manager to generate my wpa_supplicant config?

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Debian Configuration :: Newly Created Users Can't Login?

Aug 27, 2010

i've written a bash script to add new users to our system. the script works so I won't bother you all about that. when a new user is created with it, they can immediately login to our domain from any terminal, which is good. However, the newly created user is unable to login to debian at all, and so cannot access the server. when attempting to do so, they get a message like "the system administrator has disabled your account". This is a good thing really as normal users have no need for debian login, but I do need to add a few admin users who will need direct access to the server machine.

/usr/sbin/useradd -g smbusers -d /home/$username -s /bin/false -m $username
passwd $username
smbpasswd -a $username

This is the code I'm using to add the user. The rest of my script is just a wrapper and GUI. I figure the login shell may have something to do with it, so I tried changing the shell of a user to the default /bin/bash. This resulted in the user being able to login - sort of. Gnome doesn't load though, and there's a cascade of errors across the screen about things failing to save or load settings. mostly stuff like nautilus, X, and gnome. the desktop background is black and there's no interface. Logging in with a previously existing account works fine though. Clearly I have an issue somewhere.

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Fedora :: Unable To Select The Newly Created GLX Context?

Jul 25, 2011

I just updated my system, not sure which package may have caused this, here are the outputs:

Mutter:
Code:
(mutter:4637): Clutter-CRITICAL **: Unable to initialize Clutter: Unable to select the newly created GLX context
Window manager error: Unable to initialize Clutter.
Compiz:

[Code]...

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Ubuntu Servers :: Newly Created User's SSH Shell Looks Different ?

Jan 25, 2011

I am running Ubuntu Server 10.04 and I just created a new user. Everything works great except the new user's SSH shell can not do certain things.

For example, I cannot arrow up for previous commands on the new user. I just get "^[[A" when I try that. (I can do this on root.)

It also looks different on root versus the user, look:

Code:

Code:

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Ubuntu :: Mouse Follows Newly Created Windows With Compiz

Feb 6, 2011

I have an Intel setup with 64bit Ubuntu. I have an NVIDIA graphics card. When I used compiz, I found that my mouse would follow newly created windows. (e.g, I would bring up terminal and if I hit F1, the mouse would move to the upper right of the screen by itself. I have since turned off compiz which resolves the issue. where I can turn it off/on.

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Ubuntu :: Cannot Mount Newly Created LUKS Filesystem

Jun 24, 2011

I just created a LUKS filesystem following these instructions. Everything seemed okay at first. It mounted with no problem and I moved some files there. I then unmounted it and remounted it to see if I would need to use a special command. It mounted right away and even allowed access to normal users. So, I rebooted to see if anything would change. Before I go on I should say that my partitioning scheme is weird. Not knowing any better I 'upgraded' to 11.04 when my update manager told me a new version was out. This didn't go well and I had to do a fresh install to put 10.10 back on my machine. After this the way it partitions the drive has been weird. What I had was /dev/sda1 which has my installation on it including /home. But, where it gets weird is /dev/sda2 would not manually mount. Looking at the disk in gparted it showed /dev/sda2 THEN under that, as if they were sub partitions or something, I had sda6 and sda7. I had been using 6 and 7 for various things and they mounted fine, so I decided to encrypt 7. After reboot I only have sda1. Everything else shows up as unallocated and ever way I try to mount I get device does not exist.

I only did the procedure for sda7 but 6 has been affected as well. There is no longer a sda2 the way there was before. This always bothered me anyway since I wanted sda2 for my /home but it wanted to call it sda6 and put it under sda2 like I said, I could never fix that, now this.

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General :: Set 775 Permission For All Newly Created Files And Folders

Sep 30, 2010

i am facing a problem regarding permissions. how can i set 775 permission for all newly created files and folders. when i give chmod -R 775 /data permission is getting to all files and folders. but when i create a folder i wont get that permission. i want this 755 permission should be permanent for all old and newly create files

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Server :: Default Size Of A Newly Created Folder?

Dec 4, 2010

I just want to know how the default size of a newly created file or folder is 4.0 kb.Does this value is mentioned in any configuration file,if that is the case can we edit that file and can we change this default value.

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Networking :: RIP V2 - OSPF Dynamically Adding And Removing Nodes

Dec 3, 2009

I am deciding to whether use OSPF or RIPv2 on my network. The key point for me is how good each of them are in dynamically adding and removing nodes. I am pretty sure that OSPF works well if a node is suddenly dropped or a new one is introduced( Please correct me if I am wrong). how good RIPv2 is at this.

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Debian :: Change Default Permissions For Newly Created Files?

Jan 19, 2011

I'm new to Debian. I've read the documentation on this but it is too heavy for a new user to understand. I would like to change the default permissions for newly created files/directories.

I want all newly created files by 'user1' to have the default permissions of:
1. "owner can read and write"
2. "group can read and write"
3. "other can read only"

Permission 1 and 3 are already default. But I would like number 2 to be default as well. (the current default for group is read only).

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Ubuntu :: Set Default File Permissions For Newly Created Directories?

Nov 18, 2010

I'm just wondering: I know that umask sets the default file permissions for files, however I want to know if there is anyway to set default file permissions for newly created directories.

For example, I want my user to create new directories that anyone can access and modify (777) but I want the new files the user creates to be 755 (read by everyone, written only by user).

Is this possible?

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Fedora Servers :: Mounting NFS Share On Newly Created Directory Failed

Mar 12, 2010

Running NFS on Fedora 10. Exports fine. I tested it locally. I tested the NFS configuration by trying to access the exported directory from my local machine, before testing it from a remote machine. While logged in as root, I created a new directory "/mnt/nfstest".

Then I mounted the NFS share at the new directory I created:
[root@eric root]# mount -t nfs localhost:/mnt/nfs /mnt/nfstest

When I tried to mount on the remote client:
[root@frank root]# mount -t nfs eric:/mnt/nfs /mnt/nfstest

After a while I got:
# mount eric:/mnt/nfs /mnt/nfstest
mount.nfs: mount system call failed

I tried strace but wasn't sure what I was looking for, but I've attached the results as a .odt file.

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Fedora Servers :: Add Newly Created Users To Supplementary Groups Automatically?

Jul 30, 2010

The question is, as far as I know Ubuntu distro adds a user created with useradd to supplementary groups automatically. For instance, I want to enable sudo for all newly created users on my LiveCD and want them to be added to the group 'wheel' on creation. I'm sure it is possible to do it in Fedora, but how?

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General :: Can't Make New Folder Or Copy Paste In Newly Created Partition?

Mar 17, 2011

I just maked an ext4 partition by the help of gparted. Ubuntu is my only OS no dual boot. Using Ubuntu Maverick. The problem is partition must be open as root to do any work else it wont even allow me to open file,create folder,cut copy paste or anything.

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General :: How To Update Newly Created Partion In RHEL6 Without Rebooting System?

Apr 17, 2011

How to update newly created partion in RHEL6 without rebooting the system?partprobe /dev/sdaN...does not work here in RHEL6, however it did work in RHEL 5.

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CentOS 5 :: How To Change Owner Of Copied Files To Newly Created Users

Jan 29, 2010

CentOS 5.4 install, likewise open standard install (For active directory authentication).I have a license service which requires a license.txt be in the users home directory.The group owner for license.txt must be the same as the license service. Whenever a new domain user logs in, it creates the all the appropriate files but the group owner for license.txt is the users domain group. My current workaround seems like more effort than it's worth, is there another way to get this process solved easier/more secure?

- copy the license.txt into /etc/skel

- created a script to check for the presence of license.txt, check it's permissions and change them if necessary

- gave the domain's group sudo [nopasswd] access to the script (the script is not writable)

- execute the script in /etc/bashrc

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Programming :: Detecting Newly Created Folders / Files On Local File System?

Apr 16, 2010

Using C++, I want to process sub-folders on my home folder sequentially each with a special naming format and containing some binary files in it:

Code:
1/
2/
3/
4/
5/
6/
...

Give above folders, I will process files in 1/ at first, 2/ at second, 3/ at third, and so on.

For some n/ folder, if I realize that n/ actually does not exist in local file system, I do not want to wait for it. Hence I will keep processing (n+1)/ folder, and so on.

However, when processing some (n+m)/ folder, previously not processed n/ folder may have been created on local file system. In this case, I do not want to miss processing it, but somehow detect its creation and process it. After processing n/ folder, I want to continue from (n+m+1)/.

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Security :: Group Write Access For Newly Created Files / Directories Without Changing Umask

Apr 3, 2009

I have several directories, each owned by root and a group of the same name,By setting the sgid bit, I made sure that newly created files and directories are owned by the correct group, and that directories have the sgid bit set too.On each newly created directory or file, the permissions are set to 755. This is because this is the default umask, and I cannot change a users umask. I actually only want files created below a particular directory to have group write access, inheriting this behaviour to newly created directories properly.I'm not on samba or NFS, I have to do this for SSH users.The filesystem is ext3.I started to fool around with ACLs, but couldn't find what I was looking for.

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General :: Change Password For Newly Created User And Root User Using Graphical?

Jan 15, 2010

I am using mint 8 for a 2 weeks, I am noob to linux but I like Mint than any other linux distro which is great alternative to windows. I have a problem regarding password reseting.

1. My laptop automatically get logged in without asking user name and password.

2. I tried to change password for newly created user and root user using graphical way but it does not work.

2. I can perform administrator task using only OEM user which is default inbuilt user of mint.

How can make my laptop to ask password when mint get booted? How to change password for other users?

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Server :: Mounting Multiple LUNs Over 1 HBA?

Apr 27, 2011

Is it possible to present multiple LUNs from 1 SAN with 1 NFS server? Currently, my NFS server is directly connected to my FC SAN. Do I have to install and configure multipathing for this to work OR is this just not possible to do over one connection?

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Server :: Multipathing Check How The Luns Are Configured

Mar 30, 2011

Multipathing in linux -need to check how the luns are configuredI have no idea about luns configuration in linux environment(newbie) and now i have issue figuring out the configurationSenario,By the look of the multipath output 3 luns are connected to server1 is from Hitachi and 2 from Sunstorage(Thumper)What i am trying to achieve,I need to check how the 3 luns are configured on OS levelI need to differentiate Hitachi and thumper lun The next is to check whether 3 luns are mirrored or not (if not ,how they configured)The third and last .I need to remove the mirroring luns (if exist) and leave the system with only Hitachi lun

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Server :: Device Mapper Not Recognizing RAID Storage Luns On RH5?

Feb 26, 2010

Greetings Fellow Knights Of The Penguin Clan....!I am having issues with device mapper seeing a 275GB Raid5 Lun from my SAN storage.I'm using IBM 2145 San Volume Controller.I am able to see a 40 GB Raid 10 device though..

########################################################################
fdisk -l |grep 'dm-*'
Disk /dev/dm-6: 42.9 GB, 42949672960 bytes

[code]....

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General :: Command To Show The Luns Mapped To Redhat Enterprise Server 6.1 Host?

Nov 15, 2010

command to show the luns mapped to redhat enterprise server 6.1 host. And how do i known the WWNN for the FC HBA attach to the host.

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Red Hat / Fedora :: Add Files Dynamically To An Already Existing Rpm?

Jul 21, 2009

I am facing a problem. I want to know how to add files to an already existing rpm. Not at the creation time of rpm. Because we have to add some files to it dynamically if any user purchases it from our webserver. I have searched everywhere but havent find any. Is it possible to do so?

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Server :: Set Terminal-title Dynamically?

Apr 22, 2010

my problem:

- i log into many linux servers (redhat, debian, suse, ubuntu)

- i want to set the terminal window/tab title to something like: time|ip|fqdn|pwd

the partial solution i found:

- declaring a function _setTitle() in /etc/bashrc

- setting PROMPT_COMMAND at all servers in /etc/bashrc, calling _setTitle is /etc/bashrc the proper place?

but i am i need of a command to set the title of the windows/tabs

solution should

- work for tabs and windows

- should use only builtins and avoid nasty cpu-wasting external forks

- work with common clients (windows/putty, linxu/gnome-terminal, linux/konsole)

- solution should base on cli, not on some gui like sshmenu!!!

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Programming :: Dynamically Loading Libraries In GNU?

Oct 22, 2010

This post isn't really asking for a tutorial, but rather asking for some ideas. I've come up with a few ideas, but they seem cumbersome and unnecessary, so I was wondering if someone with more experience than me could out. Also, my explanations suck, but I'll try to do my best. So say I have an executable called X. At some point during its execution, X loads and uses (using dlopen and dlsym) a library called Y. In Y, there a bunch of functions that call the function called, for example, void *special_malloc (size_t). These functions come from another linked library (linked during compilation) called Z. Problem is, special_malloc contains some static variables within its scope, and when those variables are reset midway through a program, an invalid free occurs (special_malloc uses garbage collection). Now, what I want to happen is that whenever lib Z calls special_malloc, it instead calls the special_malloc defined in the executable X, so that these static variables are retained. Keep in mind that I have control of the Z library, meaning I can edit the source to fit my needs.

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General :: Partitioning - Difference Between File System Created By Fdisk And File System Created By Mkfs?

Aug 1, 2011

I'm a little bit confused with partitioning the filesystem in Linux. the difference between creating the file system with fdisk and mkfs (when formatting the disk). I can't clearly tell my problem, so please look at this picture:

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General :: Dynamically Scripting Update Of MOTD?

May 5, 2011

I know this is somewhat lame, but I remember back in college the MOTD on some of the systems was a random quote. I always wanted to do that. It seemed really trivial, but still neat and clever.

I searched a bit and don't see anything built-in for CentOS, so I was considering writing a Perl script to parse the RSS feed from a quotes site, then update /etc/motd with a random quote from the feed. This would nearly guarantee I could have this on any distro with identical results. Does anyone know of anything that already exists? Is anyone interested in using a script that I write to have the MOTD updated with random quotes themselves, or am I the only one? I'm perfectly willing to share the result when I'm finished.

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General :: Scripting: Modifying SQL Fields Dynamically?

Feb 22, 2010

I'm looking for a way to dynamically modify a fied in the SQL file.

Example,

INSERT INTO `TABLE` VALUES(1AADFDF,DFF33D,10023,SOMEDATA, SOMEDATA);
INSERT INTO `TABLE` VALUES(1AADFDF,DFF33D,10098,SOMEDATA, SOMEDATA);

[code]....

The third field in this SQL file is what needs to change to n+1

"10023" needs to change to "1"
"10098" needs to change to "2"
"10123" needs to change to "3"
"10983" needs to change to "4"
etc...

I tried with awk and sed, but since both require the usage of ' (single quote), my variable fails to get updated. I know i can use cut and recreate the sql statememnt, but i believe there should be easier way using sed or awk. Would anyone know of any creative way to get this to work in one-liner? This needs to be a part of the script preferable without making call to external file.

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