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• Does my Oracle DBA need root access?

  - by Dr I

  I'm currently discussing with my Oracle DBA Collegue that request a root access on our production servers. I'm not so hot to let him use the root access on our production servers. He is arguing that he need it to perform some operations like restarting the server and some other obscure arguments. The point is that I'm not agree with him because I've set him a Oracle user/group and a dba group where Oracle user belong. Everything is running smoothy and without any root permissions for now. I also think that all administrative tasks like scheduled server restart and so one need to be operated by the proper administrator (The Systems administrator on our case) to avoid any kind of issues related to a misunderstanding of the infrastructure interactions. So, I need the help of both, sysadmins and Oracle DBAs to lead me on the correct direction. If my collegue really need this rights I'll give him, but I'm just basically quite affraid of that because of security and integrity concerns. I know that my collegue is really good as a Oracle DBA and he know is work very well, but I also know that I've very few cases where a software and its admin really need root access. Once again, I'm not looking for pros/cons but rather an advice on the way that I should take to deal with this situation.

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• accidentally concatenate a large file on a remote system

  - by Dan

  Every once in a while on a computer I'm ssh'd into, I will accidentally type "cat largefile.txt" and my screen will start rushing with text for the next 10 minutes. I'm always working in a screen session, so my current solution is to just log out and then log back in, and since it can go 100X faster when I'm logged out, it'll finish in the short time it takes me to type my password in again. Is there a better way? Either involving the fact I'm in a screen session? Or a way to do this within SSH? What doesn't work: detaching from the screen session (doesn't respond until file is done outputting) trying command to move to a different window in the screen session (also doesn't respond) typing ctrl+C to kill cat command (also doesn't respond, probably because the command is done and the buffers just have to catch up)

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• Is it possible to install Photomatix under wine?

  - by chris

  Is it possible to install Photomatix under wine? I'm running Ubuntu 9.04, and I've tried both the default download and the embedded .net version. The first attempts to install the .net framework 1.1, and fails, while the 2nd appears to install but won't run. After a bit of googling, er, binging, I tried adding the .net 2.0 runtime via winetricks, and now it appears to install OK, but still won't run - either from the wine menu, or from the command line. Is it possible? What do I need to do?

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• What exactly interpret #!/bin/bash line?

  - by vava

  Many scripts in different languages have a #!/bin/bash header with a path to interpreter, so they can be executed without explicit call to interpreter from command line. But what exactly reads this line and run the interpreter, is it shell or kernel?

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• Cannot boot from Yumi multiboot USB stick

  - by Amator

  I've just created a multiboot USB stick using Yumi. I tried to start my notebook (Asus K70IO) using it, but all I see is just a black screen with blinking underscore even after waiting for minutes. If during this time I remove the USB stick I get the message: "Operating system load error". How do I properly load my Yumi USB stick and use it? I've tried formatting it using Yumi's checkbox to format the stick in FAT32 too, but it didn't help. Now I tried to use Sardu 2.0.5 and met same problem: black screen and blinkin underscore, if I remove stick I see "Operating system load error" and my OS starts to boot. At the same time if I create bootable USB stick from ISO using UltraISO it boots smoothly.

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• how're routing tables populated?

  - by Robbie Mckennie

  i've been reading "tcp/ip illustrated" and i started reading about ip forwarding. all about how you can receive a datagram and work out where to send it next based on the desination ip and your routing table. but what confused me is how (in a home network setting) the table itself is populated. is there a lower layer protocol at work here? does it come along with dhcp? or is it simply based on the ip address and netmask of each interface? i do know (from other books) that in the early days of ethernet one had to set up routing tables by hand, but i know i didn't do that.

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• What did Emolator do with My Laptop?

  - by Garry

  I played SEGA with my KEGA.exe (Sega Emulator) and it made my right key to be malfunctioned. Befor that day, I had played it, too in my notebook with fullscreen mode, and suddenly my ACER Aspire One notebook restarted during that emulator was running and before the screen was black (boot), my screen was blue with many words but I couldn't read them, but I remember that there was a word like 000000 x 0000000 x 000000 and bla bla bla. And when I played without fullscreen mode, It didn't happened but it made my right key to be malfunctioned until when I went to Bot setup, my right key doesn't work. Do U know what is the problem of my emulator? Can U explain me for that?

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• Using nawk, how to print the first names for all those in the 916 area code? [closed]

  - by Steve

  Possible Duplicate: Using nawk, how to print all first names containing four characters? Using nawk, how to print the first names for all those in the 916 area code? I've tried nawk ‘$3 ~ /(916)/{print $1}’ inputfile but didn' work. Jody Savage:(206) 548-1278:15:188:150 Guy Quigley:(916) 343-6410:250:100:175 Dan Savage:(406) 298-7744:450:300:275 Nancy McNeil:(206) 548-1278:250:80:75 John Goldenrod:(916) 348-4278:250:100:175 Chet Main:(510) 548-5258:50:95:135

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• Installing qt headers and libraries

  - by ant2009

  Hello, Ubuntu 9.10 2.6.31-20-generic I am trying to install some software. When I do the ./configure. I get the following error: checking for Qt... configure: error: Qt (>= Qt 3.0.2) (headers and libraries) not found. Please check your installation! So I install the following package thinking this would solve the problem. sudo apt-get install libqt4-dev I was thinking that the libqt4-dev would install the headers and libraries. However, I am still getting the same problem. Any ideas? Many thanks,

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• Improving performance by using an additional static file server

  - by Max

  Hello there, I´m planning for a large website that includes many static assets (js, css, images and thumbnails) in the generated pages. That website will use TYPO3 as CMS (is is a customer requirement). I guess I could seriously improve performance / page load times by using a two server setup. One server where the main application (PHP) runs and another one where the static files sit being served by a trimmed down version of apache or something like lighthttpd. Including e. g. js or css files from the file server is of course no big deal. Just use an absolute url http://static.example.com/js/main.js and be done with it. But: that website will have pages with MANY thumbnails of e. g. product images on it. So I see two problems when the main application tries to create a thumbnail of some image: the original image like products/some.jpg is uploaded on the static file server and therefore not on the same server as the PHP application which tries to create the thumbnail. TYPO3 writes created thumbnails to a temp directory which is expected to be on the same server. Therefore, hundreds of thumbnails will be written and served from that temp directory which is on the same server as the main application - the static file server is in that case basically useless, all thumbnails will be requested from the server of the main application. So, my question is: how to overcome this shortcomings? Is it possible to "symlink" some directories to another server? So, for example, if PHP tries to open the original products image for thumbnail creation with imagecreate("products/some.jpg") the products folder actually "points" to the products folder on the static image server? I know something like this can be done with .htaccess but is it possible on file system level?

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• Using cookies with lynx

  - by XXL

  lynx -cfg=cfg.file $URL this works with the following contents of the .cfg file: SET_COOKIES:TRUE ACCEPT_ALL_COOKIES:TRUE PERSISTENT_COOKIES:TRUE COOKIE_FILE:cookie.file however, this does not: lynx -cookies=1 -accept_all_cookies=1 -cookie_file=cookie.file $URL if it's going to be of any help - here's the trace: parse_arg(arg_name=-cookies=1, mask=1, count=2) parse_arg lookup(cookies=1) ...skip (mask 1/4) parse_arg(arg_name=-accept_all_cookies=1, mask=1, count=3) parse_arg lookup(accept_all_cookies=1) ...skip (mask 1/4) parse_arg(arg_name=-cookie_file=cookie.file, mask=1, count=4) parse_arg lookup(cookie_file=cookie.file) ...skip (mask 1/4) parse_arg(arg_name=$URL, mask=1, count=5) parse_arg startfile:$URL obvious question, why? the actual difference, from what i see, is the inability to trigger "PERSISTENT_COOKIES:TRUE" by command-line options in lynx. or, maybe, i have overlooked/misunderstood something?

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• iptables ACCEPT policy

  - by kamae

  In Redhat EL 6, iptables INPUT policy is ACCEPT but INPUT chain has REJECT entry in the end. /etc/syconfig/iptables is as below: *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT Do you know why the policy is ACCEPT not DROP? I think setting DROP policy is safer than ACCEPT in case to make mistake in the chain. Actually the policy is not applied to any packet: # iptables -L -v Chain INPUT (policy ACCEPT 0 packets, 0 bytes)

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• tmpreaper, --protect and a non-root user

  - by nsg

  Hi, I'm a little confused. I have a download directory that I want to remove all files older then 30 days with tmpreaper. Just one problem, the directory in question is a separate partition with a lost+found directory, of course I need to keep it so I added --protect 'lost+found', the problem is that tmpreaper outputs: error: chdir() to directory 'lost+found' (inode 11) failed: Permission denied (PID 30604) Back from recursing down `lost+found'. Entry matching `--protect' pattern skipped. `lost+found' I have tried with other pattern like lost* and so on... I'm running tmpreaper as a non-root user because there is no reason for superuser privileges because I own all files (except lost+found). Are I'm forced to run tmpreaper as root? Or are my shell-skills not as good as I thought? I guess the problem is: tmpreaper will chdir(2) into each of the directories you've specified for cleanup, and check for files matching the <shell_pattern> there. It then builds a list of them, and uses that to protect them from removal. Any thought and/or advice? Edit: The command I'm trying to run is something like $ /usr/sbin/tmpreaper -t --protect 'lost+found' 30d /mydir 1> /dev/null error: chdir() to directory `lost+found' (inode 11) failed: Permission denied Edit 2: I read the source code for tmpreaper-1.6.13 and found this if (safe_chdir (dirname)) exit(1); and if (chdir (dirname)) { message (LOG_ERROR, "chdir() to directory `%s' (inode %lu) failed: %s\n", dirname, (u_long) sb1.st_ino, strerror (errno)); return 1; } So it seems tmpreaper needs to be able to chdir in to all directories, ignored or not. I see two options left Run tmpreaper as root Move the download directory Find a alternative tool (tmpwatch?) I will give it some more research before i make a choice.

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• What's a simple way to list the immediate subdirectories of a given location?

  - by Bribles

  Is there a built-in command or a less verbose way of achieving this? find /var/foo -maxdepth 1 -type d Or should I just make a tiny shell script or function if I'm doing this sort of thing often?

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• How to understand cpu family/model/stepping fields in /proc/cpuinfo

  - by Victor Sorokin

  I have following in cpuinfo: processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 107 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 5600+ stepping : 2 According to Wikipedia page there are two kinds of 5600+ -- one of 90nm technology, another of 65nm. How can I understand which one I have? There seem to be no direct correspondence between contents of cpuinfo and info on Wikipedia page. AMD site seems to use some other naming scheme for processors too. How can I map values of family, model and stepping from cpuinfo to the data available on Wikipedia/AMD?

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• www-data is unable to write to an NFS share

  - by Bastian

  On Debian Squeeze, I created an NFS share with these options rw,sync,no_root_squash,no_subtree_check,insecure and on the other Debian Squeeze I can successfully mount it and read write with root, but this share is intended to be used by Apache. I changed the permission to 777 just to make sure. And still, the www-data user can read, create files but not write to them! It does not sound to me like the typical permissions problem, maybe something related to NFS, a lock problem that I am not aware of. Any idea is welcome.

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• I don't see the running guest in virsh

  - by Louise Hoffman

  Using CentOS 5 with KVM. I have downloaded this KVM applicance, and when unzipped it is just a .img file. No xml file supplied. I can start the guest with /usr/libexec/qemu-kvm -hda /data/kvm/slash.img -m 512 and it works. Now I would like to make a config file for the guest. The problem is when I do # virsh -c qemu:///system list Id Name State ---------------------------------- # I don't see the guest as expected. Does anyone know what is wrong?

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• Cron ignoring an update to crontab

  - by GJ

  I've commented out a line in the crontab on a debian server, which I guess was there by default yet was causing me to get error emails every hour: # m h dom mon dow user command 17 * * * * root cd / && run-parts --report /etc/cron.hourly However, the error emails keep coming in as if it hasn't been commented out. The error emails: Subject: Cron <root@(none)> root cd / && run-parts --report /etc/cron.hourly (failed) /bin/sh: root: not found Any ideas?

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• Change permission to /proc/net/ip_conntrack on Ubuntu server 9.10

  - by bjarkef

  Hi I have a script that needs to extract certain information form the /proc/net/ip_conntrack file once in a while. I do not wish to run this script as the root user. Default permissions for the file is: $ ls -lah /proc/net/ip_conntrack -r--r----- 1 root root 0 2010-03-28 12:18 /proc/net/ip_conntrack I can change it with: sudo chmod o+r /proc/net/ip_conntrack But that does not stick after a reboot. Is there some configuration file for file-permissions in the /proc directory in Ubuntu Server 9.10? Or do I just have to stick a chmod line in some startup script?

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• How can I get Gnome-Do to open in multiple X Screens?

  - by btelles

  Hi, I LOVE Gnome-Do (the Ubuntu version of QuickSilver). The only thing is that I have several monitors, which are all completely separate X Screens (I.E. I can't move windows between them), and Gnome-Do will only open in ONE of those monitors. If I go to Monitor/Screen #2 and press Super+Space, the Gnome-Do window appears in the first monitor. Is it possible to get a separate Instance of Gnome-Do on each Screen? P.S. Using profiles may be a work-around...I've managed to get multiple instances of Firefox by using "firefox -P my_first_screen"...anything like that available in Gnome-do?

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• memcached install issues with lib event on server

  - by albert N

  I've installed libevent on my server in the directory root/data/ and have i'm about to install memcached with ./configure –with-lib-event=/data/; make; make install However, after running a bit I get this error saying i'm pointing to the wrong directory for libevent. checking for libevent directory... configure: error: libevent is required. You can get it from http://www.monkey.org/~provos/libevent/ If it's already installed, specify its path using --with-libevent=/dir/ make: *** No targets specified and no makefile found. Stop. make: *** No rule to make target `install'. Stop. Any suggestions. I am not experience with cli so anything is help. Thanks!

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• Samba server with Virtual Box Guest

  - by Anwar Shah

  I want to setup a samba server on My Ubuntu host for My Windows Guest in Virtual Box. I am using Ubuntu 12.04 and Windows version is Windows XP. VirtualBox 4.1.0.0 The Question is : How can I achieve this or Is it possible? Note: I am not trying to use the shared folder feature of Virtual Box. I used that feature already. Please Remember that I have only a physical machine. The other one is virtual.

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• Conditionnal relay in postfix

  - by Florent

  I use postfix to send direct email. But, I use a relay to send email for specific senders. So I use "sender_dependent_relayhost_maps" : /etc/postfix/main.cf : relayhost = transport_maps = hash:/etc/postfix/transport smtp_sender_dependent_authentication = yes sender_dependent_relayhost_maps = hash:/etc/postfix/sender_relay /etc/postfix/sender_relay : [email protected] smtp.relay.com So when I send an email with sender email "[email protected]", postfix will use the relay. But... I don't want to use the relay host for some recipient. ;) I think I must use "transport_map" to catch the email before it pass through "sender_dependent_relayhost_maps" but I don't know how to do it... Thanks

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• Test script if host is back online

  - by brubelsabs

  E.g. system: Ubuntu/Debian. As many of you do this probably via ping and a terminal, I always forget this terminal when switching to other task... So a noftification popup would be useful. So can I do better as this?: while; do if ping -c 1 your.host.com; expr $? = 0; then notify-send "your.host.com back online"; sleep 30s; else sleep 30s; fi; done You will need zsh and libnotify to let the snippet work. As script: #!/usr/bin/env zsh while; do if ping -c 1 $1; expr $? = 0; then notify-send "$1 back online"; sleep 30s; else sleep 30s; fi; done

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• installPrep.sh / validate.pl for Oracle 11g database on Red Hat EL 5

  - by cagcowboy

  For Oracle 9i + 10g (database), there used to be a really helpful script that you could run to validate your environment was correct before you did the install. Does such a thing exist for 11g does anyone know? Or is the validation finally done by the OUI? If something similar does still exist, please can someone point me in the right direction?

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