Overview Mozilla Firefox for AIX is an Open Source Web Browser. It delivers helpful new features and continues to lead the way in on-line security. It implements technologies like the Gecko layout engine, and supports Web standards or draft standards like HTML, XHTML, XML, CSS, DOM, and many more . Version of Firefox Mozilla Firefox with version 184.108.40.206 can be installed in AIX 5.3 and later. Installation Procedure The following rpm s are the pre requisites for Firefox(64 bit). These packages will be available from the AIX Toolbox for Linux Applications CD/DVD. Before installing the prerequisites check the availability of 150MB free space on the /opt file system. atk-1.12.3-2.aix5.2.ppc.rpm cairo-1.8.8-1.aix5.2.ppc.rpm expat-2.0.1-1.aix5.2.ppc.rpm fontconfig-2.4.2-1.aix5.2.ppc.rpm freetype2-2.3.9-1.aix5.2.ppc.rpm gettext-0.10.40-6.aix5.1.ppc.rpm glib2-2.12.4-2.aix5.2.ppc.rpm gtk2-2.10.6-4.aix5.2.ppc.rpm libjpeg-6b-6.aix5.1.ppc.rpm libpng
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By default we can see 7.29 as the latest version of curl in CentOS or RHEL7. Here we are going to see how we can upgrade it to version 7.69. We use city-fan.org repo for the upgrade of curl. Lets see how to install and enable this repo and upgrade the curl package. Install the "city-fan.org" repo # rpm -Uvh http://www.city-fan.org/ftp/contrib/yum-repo/city-fan.org-release-2-1.rhel7.noarch.rpm Enable the repo "city-fan.org" in configuration file. Open the file /etc/yum.repos.d/city-fan.org.repo and enable the repo "city-fan.org" # vim /etc/yum.repos.d/city-fan.org.repo Upgrade the "curl" package from this repo. # yum update curl -y Once the update is done you can check the version of curl package by "rpm" command. # rpm -qa |grep curl libcurl-devel-7.69.1-1.1.cf.rhel7.x86_64 python-pycurl-7.19.0-19.el7.x86_64 libcurl-7.69.1-1.1.cf.rhel7.x86_64 curl-7.69.1-1.1.cf.rhel7.x86_64 #
Swap space is the second type of memory in modern Linux systems. The primary function of swap space is to substitute disk space for RAM memory when real RAM fills up and more space is needed. Linux uses swap space to increase the amount of virtual memory available to a host. It can use one or more dedicated swap partitions or a swap file on a regular filesystem or logical volume. Now we are going to check: • Current swap space in the system. • How to identify swap volumes in the system. • How to increase the size of swap volume. • How to add one more swap device to system. This documentation is based on the test done in a CentOS 4.18.0-80.el8.x86_64 machine. The same procedure can be applied on RHEL 8 as well. We follow the LVM method to manage the volumes here though a normal partition also can be used for swap. We will see both the options here when we add another device as a swap volume. How to check the cu
Network Time Protocol is used in systems to get the clock synced between them. All systems will sync their clock with NTP server is they are configured to do so. In RHEL8 or CentOS 8 it is achieved through “ chronyd ”. The “ chronyd ” daemon can be managed by the command “ chronyc ”. Below steps involve in configuring NTP through chronyd in linux systems. · Install the necessary packages. · Configure chrony service to sync with NTP server. · Set NTP synchronization. · Enable necessary firewall rules. · Enable and start chronyd service. Installation of chrony on RHEL8 or CentOS8. The below command helps to install chronyd in RHEL/CentOS 8. [root@system1 ~]# yum install chrony -y Chrony (NTP) server configuration The main configuration file for “ chronyd ” is /etc/chrony.conf . [root@system1 ~]# vim /etc/chrony.conf Below the minimum details to be set in the chrony.conf file. · pool 2.centos.pool.ntp.org iburst # The name of the pool wh
In earlier days all RPM packages in AIX were installed by the command “rpm”. The limitation for RPM command is that the difficulty to resolve the dependent packages. Like other Linux operating system like RedHat, CentOS etc. there is a possibility to setup YUM to install packages in AIX. The below procedure will take you through the steps of configuring YUM in AIX (7.1) systems. After having many trial and error experiments, the final solution came up with YUM configuration on the system, which is already installed with any RPM packages, we may need to follow the steps like: 1. Take a backup of system (mksysb) 2. Have the list of currently installed RPM packages. 3. Remove the existing RPM packages. 4. Configure YUM as described below. 5. Install the previous packages again. Let’s start with the configuration now. Assuming that all required backups are in place to do a roll-back in case of any worst-case scenario.
Usefull Commands for AIX =================== bootinfo –r shows available RAM in KB lsattr –E l sys0 –a realmem shows available RAM in KB rmss -c 512 To change the memory size to 512 MB rmss -r resets the memory size to the original value lsattr -El en0 shows en0 driver params lsattr -El ent0 shows ent0 HW params lsattr -El rmt0 shows tape params lscfg -vpl rmt0 shows information about the tape drive lsattr -El sys0 shows system type, firmware, etc driver params lscfg –v lists all system HW configuration lsdev –C sscsi list all scsi devices lsdev –C spci list all pci devices lsparent –Ck scsi list all scsi adapters cfgmgr To onfigure devices lsdev –Cc disk Shows all disks lsdev –Cc tape Shows all tapes cfgmgr -vl < device > –v Specifies verbose output. The cfgmgr command shows information about what it is doing. cfgmgr -vl < device > Here <device> is a particular dev
Most of the Unix administrators love to work with command line and it is the most convenient way to work with Unix systems. There were occasions where we had to invoke the GUI for some applications to work with it like, invoke a Firefox browser to browse the internet through Unix systems, install an application in GUI mode etc. Here I am going to describe how can we address such situations by invoking GUI over CLI. Assumptions: You have an AIX system with remote connection through ssh. You need to invoke the GUI of an application through Xming or MobaXterm – a DISPLAY server. X Window in AIX server Minimum installation for X Window includes below filesets: X11.base.lib X11.base.rte X11.apps.config X11.apps.clients (optional to run xclock program – in this case, just for testing purpose) Install the above-mentioned packages to invoke the GUI remotely through command line. Connect through SSH X11 port forwarding On the
Minimum requirements to connect a server remotely to access GUI are: 1. Display server running in your workstation (I used MobaXterm. Software like Xming and VNC clients are also can be used.) 2. Server running with GNOM workstation and VNC server. As I mentioned above, I have “MobaXterm” installed in my laptop that will work as a display server to connect my CentOS or RHEL server remotely. You may download it from here . It is very easy to use. If you have restrictions to install it in your laptop, then you can use the portable version of it. It can be just executed like PuTTy. To make sure my CentOS or RHEL server running with Desktop software, I use below commands to install them. In CentOS 7 or RHEL 7: [root@labsrv1 ~]# yum groupinstall “GNOME Desktop” In CentOS 8 or RHEL 8: [root@labsrv1 ~]# yum groupinstall "Server with GUI To install the VNC server, use the below command. Install its dependencies as well, if it prompts for the same.
Lets talk about two scenarios here. 1. Consider that you have a physical system which has an OS crash recently. If the system is so critical, you need to restore it as soon as possible to control the business impact. How do you do that? What we usually do is that, we will install a new OS, make necessary configuration in the system and application side and restore the data. This will take hell lot of time and our business cannot wait till that much time. What is an alternative option to it to reduce the downtime? 2. You have a physical system and you need to migrate the OS to another system or create an exact replica of that system. How do you do that? Same solution as what we discussed above? Is it going to take too much time to get it done? What I suggest is, ReaR (Relax and Recover) . You can restore the exact configuration (replica) of a system from its previous backup. Let’s see how it is going to work here. In this demonstration, We ar
Most often we see that the utilization of file systems grows up and we need to do some sort of housekeeping in the file system. Mainly we identify which file consumes more space in the file systems. Sometimes we see chunk of files with small size of single file with more size consume more space in the file systems. In either situation our goal is to find out what is consuming more space, identify the necessity of those files in the file system and decide to housekeep the file system by removing the unwanted files. Here are some ways to find the big files in a directory. People mostly use the below steps to identify the big files in a directory. 1. By using “ du ” command. 2. By using “ find ” command By using “du” command. Eg . # du -a / Here “ du ” command will look for all the files in the directory including filesystems mounted on directories under “ / ” directory and list them with their size on kilo bites (KB). If you want to sort