Frequently Asked Questions About Linux / UNIX » fedora linux http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Fri, 03 Feb 2012 22:38:32 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 CentOS / RHEL: Change / Copy File SELinux Security Context Commandhttp://www.cyberciti.biz/faq/rhel-centos-feora-linux-change-copy-selinux-context/ http://www.cyberciti.biz/faq/rhel-centos-feora-linux-change-copy-selinux-context/#comments Wed, 28 Dec 2011 10:29:40 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=11302 I've created a file as follows:
ls -l -Z /etc/cron.d/vnstat -rw-r--r--. root root system_u:object_r:system_cron_spool_t:s0 /etc/cron.d/vnstat
I've created a new file /etc/cron.d/vnstat.custom.interface:
ls -l -Z /etc/cron.d/vnstat.custom.interface -rw-r--r--. root root unconfined_u:object_r:system_cron_spool_t:s0 /etc/cron.d/vnstat.custom.interface
The /etc/cron.d/vnstat is part of default vnstat package. I've installed my own version of the same. But, due to SELinux security cron job is not running. How do I change file SELinux security contex under RHEL / CentOS 6 Linux server to system_u:object_r:system_cron_spool_t:s0 from unconfined_u:object_r:system_cron_spool_t:s0 for /etc/cron.d/vnstat.custom.interface file?]]> http://www.cyberciti.biz/faq/rhel-centos-feora-linux-change-copy-selinux-context/feed/ 0 CentOS / RHEL: Install gpass Password Manager For GNOME2 Desktophttp://www.cyberciti.biz/faq/redhat-scientific-fedora-install-gpass-rpm-yum-command/ http://www.cyberciti.biz/faq/redhat-scientific-fedora-install-gpass-rpm-yum-command/#comments Fri, 26 Aug 2011 11:59:33 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10955 I've recently swiched from Ubuntu Linux to CentOS / RHEL version 6 gnome desktop. However, I'm unable to find the gpass the password manager for GNOME2 desktop in repo. How do I install the same under RHEL 6 or CentOS or Scientific Linux 6 or Fedora Linux 15?]]> http://www.cyberciti.biz/faq/redhat-scientific-fedora-install-gpass-rpm-yum-command/feed/ 0 yum Command Hangs on Running Transaction Test Message Error and Solutionhttp://www.cyberciti.biz/faq/rhel-centos-fedora-redhat-yum-running-transaction-test-error/ http://www.cyberciti.biz/faq/rhel-centos-fedora-redhat-yum-running-transaction-test-error/#comments Fri, 01 Jul 2011 23:53:45 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10778 When I run 'yum install package' or 'yum update' commands the yum command works normally until Running Transaction Test and hangs until the yum process is killed manually using the kill command. How do I fix this problem under CentOS Linux 5.x AMD64 running on HP server?]]> http://www.cyberciti.biz/faq/rhel-centos-fedora-redhat-yum-running-transaction-test-error/feed/ 2 RHEL / CentOS / Fedora: Verify GPG Key For Package Updatehttp://www.cyberciti.biz/faq/redhat-centos-linux-verify-rhn-rhn-repo-package-gpg-keys/ http://www.cyberciti.biz/faq/redhat-centos-linux-verify-rhn-rhn-repo-package-gpg-keys/#comments Tue, 14 Jun 2011 19:46:04 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10692 How do I verify that the system using correct GPG keys to verify all patches, packages and update installed from RHN or repo under RHEL 5 or 6 server operating systems?]]> http://www.cyberciti.biz/faq/redhat-centos-linux-verify-rhn-rhn-repo-package-gpg-keys/feed/ 0 Redhat / CentOS: Install Internet whois / nicname Clienthttp://www.cyberciti.biz/faq/rhel-fedora-linux-install-internet-whois-nicname-client/ http://www.cyberciti.biz/faq/rhel-fedora-linux-install-internet-whois-nicname-client/#comments Fri, 20 May 2011 07:04:34 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10531 How do I install whois client to see whois information about domain and ip address using command line options under Fedora / RHEL / Redhat / CentOS / Scientific Linux?]]> http://www.cyberciti.biz/faq/rhel-fedora-linux-install-internet-whois-nicname-client/feed/ 1 RHEL 6: Change OpenSSH Port To 1255 ( SELinux Config )http://www.cyberciti.biz/faq/centos-redhat-enterprise-linux6-change-sshd-port-number/ http://www.cyberciti.biz/faq/centos-redhat-enterprise-linux6-change-sshd-port-number/#comments Fri, 13 May 2011 21:17:47 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10484 I've edited /etc/ssh/sshd_config to change the port number:
Port 1255
However, I'm getting an error as follows:
sshd[26792]: error: Bind to port 1255 on 192.168.1.100 failed: Permission denied
How do I change default OpenSSH port number from 22 to 1255 under RedHat Enterprise Linux server version 6 and SELinux? ]]> http://www.cyberciti.biz/faq/centos-redhat-enterprise-linux6-change-sshd-port-number/feed/ 3 RHEL 6: semanage SELinux Command Not Foundhttp://www.cyberciti.biz/faq/redhat-install-semanage-selinux-command-rpm/ http://www.cyberciti.biz/faq/redhat-install-semanage-selinux-command-rpm/#comments Fri, 13 May 2011 20:56:39 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10477 I'm trying to use semanage command to configure certain elements of SELinux policy without requiring modification to or recompilation from policy sources under RHEL 6 server. But, I'm not able to find out this command and/or package name. How do I install semanage command under RedHat Enterprise Linux?]]> http://www.cyberciti.biz/faq/redhat-install-semanage-selinux-command-rpm/feed/ 3 Install Iptables Firewall in Redhat / CentOS Linuxhttp://www.cyberciti.biz/faq/redhat-centos-rhel-fedora-iptable-installation/ http://www.cyberciti.biz/faq/redhat-centos-rhel-fedora-iptable-installation/#comments Tue, 05 Apr 2011 10:12:46 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10207 How do I install iptables under Redhat (RHEL) or CentOS or Fedora Linux operating systems?]]> http://www.cyberciti.biz/faq/redhat-centos-rhel-fedora-iptable-installation/feed/ 0 KVM Virtualization: Start VNC Remote Access For Guest Operating Systemshttp://www.cyberciti.biz/faq/linux-kvm-vnc-for-guest-machine/ http://www.cyberciti.biz/faq/linux-kvm-vnc-for-guest-machine/#comments Mon, 04 Oct 2010 17:19:02 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=8930 I'm running a KVM virtual machine (FreeBSD 7 and Fedora Linux 13 desktop) under Redhat Enterprise Linux 5.5. However, I'm not getting the remote access via VNC (Virtual Network Computing) to access my Fedora Linux graphical desktop or FreeBSD console. How do I turn on VNC support without reinstalling both operating systems?]]> http://www.cyberciti.biz/faq/linux-kvm-vnc-for-guest-machine/feed/ 2 HowTo: Linux Install LibreOfficehttp://www.cyberciti.biz/faq/debian-redhat-ubuntu-linux-install-lo_3-3-0-linux_x86_install-rpm_en-us-tar-gz/ http://www.cyberciti.biz/faq/debian-redhat-ubuntu-linux-install-lo_3-3-0-linux_x86_install-rpm_en-us-tar-gz/#comments Fri, 01 Oct 2010 07:53:10 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=8871 How do I install newly released LibreOffice under Debian, Ubuntu or Fedora Linux?]]> http://www.cyberciti.biz/faq/debian-redhat-ubuntu-linux-install-lo_3-3-0-linux_x86_install-rpm_en-us-tar-gz/feed/ 6 CentOS / Redhat Linux: Install OpenNTPD To Synchronize The Local Clockhttp://www.cyberciti.biz/faq/openntpd-on-centos-rhel-fedora-linux/ http://www.cyberciti.biz/faq/openntpd-on-centos-rhel-fedora-linux/#comments Thu, 24 Jun 2010 02:02:21 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7953 OpenNTPD is a Unix system daemon implementing the Network Time Protocol to synchronize the local clock of a computer system with remote NTP servers. How do I install OpenNTPD under CentOS / RHEL / Fedora Linux instead of default NTPD client / server?]]> http://www.cyberciti.biz/faq/openntpd-on-centos-rhel-fedora-linux/feed/ 0 Mac OS X: Read Linux ext3 / ext4 External USB Hard Disk Partitionhttp://www.cyberciti.biz/faq/mac-os-x-read-ext3-ext4-external-usb-hard-disk-partition/ http://www.cyberciti.biz/faq/mac-os-x-read-ext3-ext4-external-usb-hard-disk-partition/#comments Wed, 12 May 2010 15:28:37 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7365 How do I read (mount and access files) ext3 / ext4 external hard disk partition under Mac OS X?]]> http://www.cyberciti.biz/faq/mac-os-x-read-ext3-ext4-external-usb-hard-disk-partition/feed/ 7 phpMyAdmin: Cannot load mysql extension. Please check your PHP configurationhttp://www.cyberciti.biz/faq/cannot-load-mysql-extension-check-your-phpconfiguration/ http://www.cyberciti.biz/faq/cannot-load-mysql-extension-check-your-phpconfiguration/#comments Sun, 14 Mar 2010 15:14:31 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=6780 I got new server and installed phpMyAdmin. But whenever I visit the phpmyadmin url it says:

Cannot load mysql extension. Please check your PHP configuration

How do I fix this problem under CentOS / RHEL / Fedora Linux Apache web server?
]]> http://www.cyberciti.biz/faq/cannot-load-mysql-extension-check-your-phpconfiguration/feed/ 2 Linux Create A Bootable USB Penhttp://www.cyberciti.biz/faq/linux-create-a-bootable-usb-pen/ http://www.cyberciti.biz/faq/linux-create-a-bootable-usb-pen/#comments Thu, 11 Mar 2010 07:05:34 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=6742 How do I create a bootable USB pen drive to start my CentOS / Fedora Linux? How do I create a bootable USB flash pen for installation of Linux, and for creation of rescue and other special-purpose boot disks using command line options?]]> http://www.cyberciti.biz/faq/linux-create-a-bootable-usb-pen/feed/ 11 Fedora Linux Install Linux Kernel Headers And Developer Fileshttp://www.cyberciti.biz/faq/fedora-install-linux-kernel-headers-developer-rpm/ http://www.cyberciti.biz/faq/fedora-install-linux-kernel-headers-developer-rpm/#comments Thu, 11 Mar 2010 06:03:53 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=6735 I'm trying to install vmware-tools but Fedora Linux v12 prompting for kernel headers. How do I install kernel headers under Fedora Linux?]]> http://www.cyberciti.biz/faq/fedora-install-linux-kernel-headers-developer-rpm/feed/ 0 Redhat Linux: Find Out My IP Addresshttp://www.cyberciti.biz/faq/howto-find-ip-address-on-centos-fedora-redhat-enterprise-linux/ http://www.cyberciti.biz/faq/howto-find-ip-address-on-centos-fedora-redhat-enterprise-linux/#comments Thu, 21 Jan 2010 19:46:34 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9819 How do I to find out ip address on a CentOS or Fedora or Redhat Enterprise Linux server or desktop system using bash shell or command line options?]]> http://www.cyberciti.biz/faq/howto-find-ip-address-on-centos-fedora-redhat-enterprise-linux/feed/ 1 Fedora Linux: Start / Stop / Restart Apache Serverhttp://www.cyberciti.biz/faq/starting-restarting-stopping-apache-server-on-fedora/ http://www.cyberciti.biz/faq/starting-restarting-stopping-apache-server-on-fedora/#comments Sun, 08 Nov 2009 18:40:12 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9221 How do I start / stop / restart the Apache server under Fedora Linux using command line options?]]> http://www.cyberciti.biz/faq/starting-restarting-stopping-apache-server-on-fedora/feed/ 0 Linux Iptables Open LDAP Server TCP Ports 389 and 636http://www.cyberciti.biz/faq/configure-linux-iptables-to-allow-access-ldap-server/ http://www.cyberciti.biz/faq/configure-linux-iptables-to-allow-access-ldap-server/#comments Sun, 16 Aug 2009 09:28:43 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4838 The default Iptables configuration under CentOS / Red Hat / RHEL / Fedora Linux does not allow inbound access to LDAP service. How do I update iptables settings to allow access to the LDAP primary TCP #389 and encrypted-only TCP # 636 ports, while keeping all other ports on the server in their default protected state?]]> http://www.cyberciti.biz/faq/configure-linux-iptables-to-allow-access-ldap-server/feed/ 6 Linux Disable / Remove All NFS Serviceshttp://www.cyberciti.biz/faq/centos-redhat-rhel-fedora-remove-nfs-services/ http://www.cyberciti.biz/faq/centos-redhat-rhel-fedora-remove-nfs-services/#comments Sun, 16 Aug 2009 09:19:14 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4834 NFS was not designed with security in mind, and has a number of weaknesses, both in terms of the protocol itself and because any NFS installation must expose several daemons, running on both servers and clients, to network attack. I use my CentOS based server only to server web pages and nothing else. How do I disable NFS services under RHEL / CentOS / Fedora Linux?]]> http://www.cyberciti.biz/faq/centos-redhat-rhel-fedora-remove-nfs-services/feed/ 7 Adobe Photoshop Alternatives For Linux Desktophttp://www.cyberciti.biz/faq/adobe-photoshop-alternatives-for-linux-desktop/ http://www.cyberciti.biz/faq/adobe-photoshop-alternatives-for-linux-desktop/#comments Thu, 13 Aug 2009 08:56:31 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4752 I need Photoshop alternative under Ubuntu Linux for basic editing. I know Photoshop can be run using Wine but I'm not able to afford expensive software for just basic editing. Can you suggest a few free FOSS apps that works as alternatives to Photoshop under Ubuntu or Fedora Linux desktop operating systems?]]> http://www.cyberciti.biz/faq/adobe-photoshop-alternatives-for-linux-desktop/feed/ 6