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• bash code in rc.local not excuting after bootup

  - by mrTomahawk

  Does anyone know why a system would not execute the script code within rc.local on bootup? I have a post configuration bash script that I want to run after the initial install of VMware ESX (Red Hat), and for some reason it doesn't seem to execute. I have the setup to log its start of execution and even its progress so that I can see how far it gets in case it fails at some point, but even when I look at that log, I am finding that didn't even started the execution of the script code. I already checked to see that script has execution permissions (755), what else should I be looking at? Here is the first few lines of my code: #!/bin/sh echo >> /tmp/configLog "" echo >> /tmp/configLog "Entering maintenance mode"

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• Can't login to a new mysql user

  - by mostar

  Hi, When I create a new Mysql user, it is impossible to login using this user and password. Only if I crate a user without a password I can login. For example: mysql -u root -phererootpass grant all privileges on mydb.* to testuser@'%' identified by '' with grant option; grant all privileges on mydb.* to testuser2@'%' identified by 'mypass' with grant option; FLUSH PRIVILEGES; exit; mysql -u testuser #<<< work fine mysql -u testuser2 -pmypass #<<< fail to login ERROR 1045 (28000): Access denied for user 'testuser2'@'localhost' (using password: YES) </code> I'm using Mysql 5.0 on Red Hat v5 Please advice Mostar

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• Problems during binding SpotLight to the instance

  - by Rodnower

  Hello, I have RAC Oracle11 installation built from 2 nodes running on Linux Red Hat OS. Now, I try to make connection from SpotLight running on Windows 7 to the Instance of one of nodes (TNS name of it is: LIBD1) This what I do: Make new connection - give user with SYS permission - connect - get error about that, that user not configured - User Configuration Wizard opens - give SYS as user with sysdba permissions (real SYS not other user with SYS permission) - check "configure new user" option - give new user name - next And I get error: DBMS_SQL access.denied. What I do wrong? Thank you for ahead.

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• Duplicate pseudo terminals in linux

  - by bobtheowl2

  On a redhat box [ Red Hat Enterprise Linux AS release 4 (Nahant Update 3) ] Frequently we notice two people being assigned to the same pseudo terminal. For example: $who am i user1 pts/4 Dec 29 08:38 (localhost:13.0) user2 pts/4 Dec 29 09:43 (199.xxx.xxx.xxx) $who -m user1 pts/4 Dec 29 08:38 (localhost:13.0) user2 pts/4 Dec 29 09:43 (199.xxx.xxx.xxx) $whoami user2 This causes problems in a script because "who am i" returns two rows. I know there are differences between the two commands, and obviously we can change the script to fix the problem. But it still bothers me that two users are being returned with the same terminal. We suspect it may be related to dead sessions. Can anyone explain why two (non-unique) pts number are being assigned and/or how that can be prevented in the future?

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• Why are all Linux commands broken after installing Perl?

  - by user115079

  I installed perl using following command: curl -L http://xrl.us/installperlnix | bash after that i run following command to create soft link ln -sf /usr/local/bin/perl /usr/bin/perl now I'm trying to run commands like dir, mkdir, ll, rm, vi but nothing seems to be working for me. also when i try to login into my shell i get following msg at startup: Last login: Wed Apr 4 21:50:12 2012 from x.y.z.ip -bash: perl: command not found please help. Here is system detail: cat /proc/version Linux version 2.6.18-274.18.1.el5.028stab098.1 (root@rhel5-build-x64) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)) #1 SMP Sat Feb 11 15:30:41 MSK 2012 cat /etc/issue CentOS 5.7 32 bit Kernel \r on an \m Don't know if perl was already installed or not. and now i can't check.

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• Sudo yum seems to fail on CentOS, but works fine after sudo -i

  - by Aron Rotteveel

  I am currently having some trouble with yum through sudo. For some reason, it does not seem to work: aron@graviton [/var/log]# sudo yum clean all There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: /usr/lib64/python2.4/lib-dynload/datetime.so: failed to map segment from shared object: Cannot allocate memory Please install a package which provides this module, or verify that the module is installed correctly. It's possible that the above module doesn't match the current version of Python, which is: 2.4.3 (#1, Sep 3 2009, 15:37:37) [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] If you cannot solve this problem yourself, please go to the yum faq at: http://wiki.linux.duke.edu/YumFaq The strange thing, however, is that it works fine when I gain root privileges through sudo -i first. Any ideas what might be causing this problem?

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• Linux stretch cluster: MD replication, DRBD or Veritas?

  - by PieterB

  For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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• Determining Performance Limits

  - by JeffV

  I have a number of windows processes that pass messages between them hat a high rate using tcp to local host. Aside from testing on actual hardware how can I assess what my hardware limit will be. These applications are not doing CPU intensive work, mostly decomposing and combining messages, scanning over them for special flag in the data etc.. The message size is typically 3k and the rate is typically ~10k messages per second. ~30MB per second between processing stages. There may be 10 or more stages depending. For this type of application, what should I look to for assessing performance? What do I look for in a server performance wise? I am currently running an XEON L5408 with 32 GB ram. But I am assuming cache is more important than actual ram size as I am barely touching the ram.

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• Linux stretch cluster: MD replication, DRBD or Veritas?

  - by PieterB

  For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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• permission denied when trying to execute a binary I burned to a CD-R

  - by user16654

  On a UBUNTU karmic machine, I burned a cd from the command prompt using: cdrecord -v speed=16 dev=0,1,0 /FPS.iso The CD now contains an executable and some files. I tested the cd by loading it onto another machine (Red Hat 5.3) and when I try to run the program I get the following message: bash: ./FPS1_1: Permission denied I can open other files like text documents (the executable also comes with shared libraries). I realized I had burned the cd as root so I burned another one as another user but I still got the same problem. How can I remove this permission or what is the problem? P.S. the image was in / if that helps

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• How to convert .flv file to .3gp using ffmpeg?

  - by Chetana

  I have converted any video format to 3gp file format using ffmpeg on one server. But on another server it not works. Following is my script: exec("ffmpeg -i test.flv -sameq -acodec libmp3lame -ar 22050 -ab 96000 -deinterlace -nr 500 -s 320x240 -aspect 4:3 -r 20 -g 500 -me_range 20 -b 270k -deinterlace -f flv -y test.3gp "); Can anyone tell me what is wrong in script? Following is my ffmpeg setting: root@ninja [~]# ffmpeg -formats ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mp3lame --enable-libogg --enable-gpl --disable-mmx --enable-shared built on Jun 17 2009 10:51:43, gcc: 4.1.2 20080704 (Red Hat 4.1.2-44)

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• need help writing puppet module for sssd.conf using Hiera

  - by mr.zog

  I need to build a module to manage /etc/sssd/sssd.conf on our Red Hat VMs. The sssd modules published on the forge don't seem to do what I want, nor do I feel like forking any of them. I want to keep all the configuration data in Hiera's common.yaml file. Below is my sssd.conf file. [sssd] config_file_version = 2 services = nss, pam domains = default [nss] filter_groups = root filter_users = root reconnection_retries = 3 entry_cache_timeout = 300 entry_cache_nowait_percentage = 75 [pam] [domain/default] auth_provider = ldap ldap_id_use_start_tls = True chpass_provider = ldap cache_credentials = True ldap_search_base = dc=ederp,dc=com id_provider = ldap ldap_uri = ldaps://lvldap1.lvs01.ederp.com/ ldaps://lvldap2.lvs01.ederp.com/ ldap_tls_cacertdir = /etc/openldap/cacerts What is the best, most economical way to build the sssd.conf file? Should I have multiple .pp files such as domain.pp, pam.pp etc. or should all the lines of configuration land in init.pp?

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• environment variable issue in shell

  - by George2

  I am using Red Hat Linux Enterprise 5. I know the theory that -- using export to set environment variable, the environment variable will apply to current and child environment, but without using export to set environment variable, the environment variable will only apply to the current environment. My confusion is, what is the exact definition of "child environment" and "current environment"? For example, $ var1=123 $ echo "Hello [$var1]" the value of var1 (which is 123) is printed in shell, but I think echo is a command invoked by current shell, and it (the echo command) should be a child environment of current shell and the value of var1 should not (because not using export var1=123) impact echo. Any comments? Thanks in advance!

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• Can a 32-bit RHEL4 userland work with a 64-bit kernel?

  - by James

  Is there a way to change an i386 RHEL4 machine to run an amd64 kernel, but ensure that it still builds software into same i386 binaries? On Debian this seems quite straightforward: just install an amd64 kernel (worst case, build one like this guy: http://www.debian-administration.org/users/jonesy/weblog/1) and prefix everything with "linux32". Then everything that considers uname -m will be unchanged, I just need to handle the few cases that consider uname -r. What is the Red Hat equivalent? Is the only way a full 64-bit installation on another disk and then chrooting back to the 32-bit system before anyone builds anything? (Even the best examples of that seem to be Debian-based.) Background: We make a large system that runs on (a variant of) i386 RHEL4. However, some of the larger RHEL build machines now have enough RAM that they might benefit from going 64-bit (for the kernel and maybe some of the bigger build steps). Our build system doesn't support cross-compilation.

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• Configuring Redhat / CentOS 5 SSH to authenticate to IPA server with public keys

  - by Kyle Flavin

  I'm trying to configure some Red Hat/CentOS servers to use an ipa-server on CentOS 6 for SSH authentication with public keys. I'm storing the public keys on the IPA server, which works great on Centos6 using "AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys" in /etc/ssh/sshd_config. However, on RH 5.10, neither the "AuthorizedKeysCommand" directive or the "/usr/bin/sss_ssh_authorizedkeys" command exist to pull the public key from the directory. Is there a different way to make this work? Googling this mostly returns instructions for setting it up on 6.

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• Connecting a USB laptop to a RJ45 serial port

  - by Jon

  We are about to get our first managed switch at work (Procurve 2520G-24-PoE), and this lowly programmer gets to put on his admin hat and try to configure it. The switch has an RJ45 serial port for console access. My laptop has USB ports but no serial port. In fact, there isn't a single computer in the office with a serial port. I've seen USB-to-DB9 adapters, but I need to go from USB to RJ45 (serial). How would I go about accomplishing this? Do I need two adapters? Will USB-to-DB9 and then DB9-to-RJ45 work? Thanks in advance.

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• ISA caching with no cache-related info in response header

  - by Mike M. Lin

  From the documentation, I can't figure out what criteria an ISA server uses to figure out if a cached file is valid when no cache-related info is in the response header. Let's say I got this header in my response on Thu, 13 Jan 2011 18:43:35 GMT: HTTP/1.1 200 OK Date: Thu, 13 Jan 2011 18:43:35 GMT Server: Apache/2.2.3 (Red Hat) Content-Language: en X-Powered-By: Servlet/2.5 JSP/2.1 Keep-Alive: timeout=15 Connection: Keep-Alive Transfer-Encoding: chunked Content-Type: text/html; charset=ISO-8859-1 There's no cache directive, no last-modified field, no expires field. How will the ISA server decide for how long to cache this response?

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• How to configure sudoers to always keep LD_LIBRARY_PATH envrionment variable?

  - by Yanick Girouard

  No matter what I try, it seems that the LD_LIBRARY_PATH environment variable is not kept after I run a command with sudo. The only way I managed to have it stick, is to prefix my sudo command with LD_LIBRARY_PATH=/the/path whenever I call it from the command-line, but I would like to not have to do this every time. It seems the env_keep option ignores this variable, and so does the exempt_group option. My %group currently has ALL=(ALL) NOPASSWD:ALL as its access in sudoers. I would like this specific environment variable to be kept for any command I run. How can I do this? My server is running Red Hat Enterprise Linux 5.7.

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• "No such file or directory" when the file is there

  - by Arlaud Agbe Pierre

  I'm trying to run XPDF on a linux (probably red hat) OVH shared server. I've managed to have ftp ssh access and put the 64 bits binaries onto a folder. The problem is : even though the files are there with the right permissions, if I try running it I'm getting a file not found problem (I'm thinking about a missing link..) Long story short : jurisedi@ssh1:~/xpdf$ file pdftotext pdftotext: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), stripped jurisedi@ssh1:~/xpdf$ ./pdftotext -ovh: jurisedi@ssh1:~/xpdf$: No such file or directory Any ideas ?

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• Windows Mobile deletes my Contacts when deleting a partnership

  - by bitbonk

  Sometimes when I reinstall my PC get a new Work PC or buy a new home PC ,ActiveSync, now the Device Center asks me to delete an existing partnership to setup a partnership with the new PC, since only two partnerships are allowed. When I delete that partnership all contacts that originally came from that partnership get deleted too. How can I prevent that from happening. Do I really always have to remember to frequently backup all my contacts in a safe place? How much redundancy is needed. I hat them on one of my PCs and on my phone.

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• Not able to connect to internet in RHEL 5

  - by chankey007

  I just installed red hat enterprise 5 in my laptop and on desktop both. In desktop it is working fine but in laptop it is not showing the eth device. (I tried ifconfig only lo is there). I tried ifup eth0 still nothing happened. The network service in /etc/sysconfig/network-scripts/ifcfg-eth0 and in /etc/sysconfig/network are enable. I had ubuntu in my laptop before and I faced same problem with that too. Is there any problem with my laptop? I have my system on dual boot and in win7 networking is running fine. I am not able to connect to the internet only, other devices are working fine. System conf: Sony vaio E series. 3 GB RAM, intel core i3 2.13 GHZ.

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• Not able to connect to internet in RHEL 5

  - by chankey007

  I just installed red hat enterprise 5 in my laptop and on desktop both. In desktop it is working fine but in laptop it is not showing the eth device. (I tried ifconfig only lo is there). I tried ifup eth0 still nothing happened. The network service in /etc/sysconfig/network-scripts/ifcfg-eth0 and in /etc/sysconfig/network are enable. I had ubuntu in my laptop before and I faced same problem with that too. Is there any problem with my laptop? I have my system on dual boot and in win7 networking is running fine. I am not able to connect to the internet only, other devices are working fine. System conf: Sony vaio E series. 3 GB RAM, intel core i3 2.13 GHZ.

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• How to install java-1.7.0-openjdk-devel on RHEL Server 6.3?

  - by andand

  I have need of installing a Java 7 development environment on a RHEL 6.3 (system details are below). Following the official OpenJDK directions I tried yum install java-1.7.0-openjdk-devel (as root). This yields the error message: No package java-1.7.0-openjdk-devel available. The Java6 JDK java-1.6.0-openjdk-devel and the Java7 JRE java-1.7.0-openjdk are both available, but the Java7 JDK does not appear. Is there a non-default repository from which I can install this? If so what is it? Distribution: Red Hat Enterprise Linux Server release 6.3 (Santiago) Kernel: 2.6.32-279.5.2.el6.x86_64

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• How to tell if linux disk IO is causing excessive (> 1 second) application stalls

  - by noahz

  I have a Java application performing a large volume (hundreds of MB) of continuous output (streaming plain text) to about a dozen files a ext3 SAN filesystem. Occasionally, this application pauses for several seconds at a time. I suspect that something related to ext3 vsfs (Veritas Filesystem) functionality (and/or how it interacts with the OS) is the culprit. What steps can I take to confirm or refute this theory? I am aware of iostat and /proc/diskstats as starting points. Revised title to de-emphasize journaling and emphasize "stalls" I have done some googling and found at least one article that seems to describe behavior like I am observing: Solving the ext3 latency problem Additional Information Red Hat Enterprise Linux Server release 5.3 (Tikanga) Kernel: 2.6.18-194.32.1.el5 Primary application disk is fiber-channel SAN: lspci | grep -i fibre 14:00.0 Fibre Channel: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter (rev 03) Mount info: type vxfs (rw,tmplog,largefiles,mincache=tmpcache,ioerror=mwdisable) 0 0 cat /sys/block/VxVM123456/queue/scheduler noop anticipatory [deadline] cfq

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• Unable to connect to Cygwin from Mac OS X by ssh

  - by skyjack

  I've started ssh server on Windows 7 using Cywgin and I'm trying to connect to it by ssh from Mac OS X Mavericks. It fails with next error: ./ssh username@hostname -v OpenSSH_6.6, OpenSSL 1.0.1g 7 Apr 2014 debug1: Reading configuration data /usr/local/etc/ssh/ssh_config debug1: Connecting to hostname [my ip] port 22. debug1: Connection established. debug1: identity file /Users/skyjack/.ssh/id_rsa type -1 debug1: identity file /Users/skyjack/.ssh/id_rsa-cert type -1 debug1: identity file /Users/skyjack/.ssh/id_dsa type -1 debug1: identity file /Users/skyjack/.ssh/id_dsa-cert type -1 debug1: identity file /Users/skyjack/.ssh/id_ecdsa type -1 debug1: identity file /Users/skyjack/.ssh/id_ecdsa-cert type -1 debug1: identity file /Users/skyjack/.ssh/id_ed25519 type -1 debug1: identity file /Users/skyjack/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.6 ssh_exchange_identification: read: Connection reset by peer Meanwhile I can connect successfully from Red Hat. OpenSSH version on Cygwin: OpenSSH_6.4p1, OpenSSL 1.0.1f 6 Jan 2014 OpenSSH version on MAC OS X: OpenSSH_6.6p1, OpenSSL 1.0.1g 7 Apr 2014 Please advice.

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