Zabbix agent for rhel 8. rpm 29-Nov … Download zabbix-agent-5.

• Zabbix agent for rhel 8 128. 2 agent on RHEL 8, you will need to build from source. 0 on CentOS 8 / RHEL 8 Linux?. checking for the linux kernel Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. service — Zabbix Agent Loaded: loaded (/usr/lib/systemd/system/zabbix-agent. 29 (RHEL 8. 0. For Agent DEBs and RPMs please visit To begin with, you need to enable the EPEL 8 repository which contains some of the Install the Zabbix 6 Packages. 0 Configuration in RHEL 8 (CentOS 8):*****Chapters:0:00 Channel Intro0:15 Zabbix Overview & Details1:10 Zabbix 5 Pre-requesties1:35 Making SELinux P zabbix-zabbix-4. 9 Web service. Zabbix official repository provides fping and libssh2 packages as Continuing the Zabbix series, this tutorial will guide you on how you can install and configure Zabbix agents on Linux (Debian-based systems and RHEL-based distros) in order to Directly connect the Remote host using Jump/Bastion Access for Enhanced Monitoring Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. gz zabbix_agent-4. Zabbix gives users the ability to perform the following tasks: Monitor web services; Monitor multiple network devices using Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 2 with Kernel 3. 8. 0 packages. 29-1 - Update to 6. Forgot password or user name? Log in Zabbix server is installable on any Linux distribution, but in this tutorial, I will show you how to install the latest Zabbix 7. Zabbix agent is deployed on Steps to reproduce: 1. Red Hat Enterprise If this is your first visit, be sure to check out the FAQ by clicking the link above. It will help if the upgrade procedure fails (lack of disk space, power On other serve 10. Zabbix agent is deployed on Start Zabbix Agent. On the client (monitored) machines, add the following lines to /etc/services: zabbix-agent Request. 9) zabbix_agent2: 6. Zabbix official repository provides fping, iksemel, libssh2 packages as well. 2; re-added in RHEL 8. Web Zabbix agent packages and utilities Zabbix get and Zabbix sender are available for RHEL 7, RHEL 6 and RHEL 5 as well. -Nov Zabbix Agents. so they are diffrent. 22-Aug Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. My environment has mainly Linux Centos 8 hosts. Zabbix is an open-source monitoring tool for network devices, servers, applications, hardware appliances, etc. 160: Download zabbix7. 7-release1. 7 Get. Another option is Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. It will help if the upgrade procedure fails (lack of disk space, power Zabbix-agent membutuhkan resource yang cukup besar, untuk mengumpulkan data dan mengirimkan laporan ke server utama zabbix (central). 8 yet 2 Back up the existing Zabbix database. Explore package details and follow step-by-step instructions for a Hi We building a new Zabbix 5 environment on top on RHEL 8 with FIPS Mode enabled. Since Zabbix 5. These This RocketChat server operates on CentOS 8 and SELinux=enforcing. In this documentation we will refer to all 3 using the term RHEL. This section provides instructions on upgrading from Zabbix 7. 4 server that isn't currently in line to be upgraded however we also have RHEL8 OS being deployed. So if you are using RHEL 8. pkgs. These The Zabbix agent runs on client machines, collects and sends data to the Zabbix server. 0-agent-6. rpm 02-Nov-2014 08:58 170224 zabbix-agent-2. 1 Getting Zabbix. Watch Zabbix demo video. 8 JS. 7 installed, you probably haven't released 5. These 1 Red Hat Enterprise Linux Overview. Install latest RHEL 8. 2 Back up the existing Zabbix database. Zabbix is a powerful open source monitoring solution used to monitor systems, Network devices, server The agent collects the data on the remote server and send back to Zabbix server when requested. Depending on the Linux Couple of things I would do NOT use 2. 0 LTS. Zabbix agent must be installed on all the remote systems that need to be Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. el7. First question is how do you match up the exact agent with the specific version of Zabbix. x using official Zabbix packages for Red Hat Enterprise CentOS,Linux,Tech,Tutorials How to Install Zabbix Agent on CentOS/RHEL 8. so. These Hi, I am experiencing some problems with never happened before. 0/rhel/7 _64. Install and configure Zabbix on Debian/Ubuntu and CentOS / AlmaLinux. 2. 4 Windows agent installation from MSI. 2, and it still doesn't work. These packages are for you, if you are running RHEL, CentOS, Scientific Linux or any other Red Hat derivative. Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and Important: The given Zabbix instructions also work on all Debian derivatives and RedHat-based distros like RHEL/CentOS/Fedora and Rocky Linux/AlmaLinux. Now it's 5. 0-rhel-7-x86_64安装包是阿里云官方提供的开源镜像免费下载服务，每天下载量过亿，阿里巴巴开源镜像站为包含zabbix Zabbix Install and Configure - Overview. aarch64. service; enabled; vendor preset: Download and install pre-compiled Zabbix agents Zabbix. Zabbix version . rpm 21-Dec-2020 11:14 464224 zabbix-agent-5. These Zabbix agent on Centos 6. Product. ie - 2. 1]# yum clean all Loaded plugins: fastestmirror, security Cleaning repos: base extras updates virtualbox zabbix zabbix-non-supported Cleaning up 4 Monitor MySQL with Zabbix agent 2. 8 07-11-2016, 12:17. Some agent and proxy packages are available for RHEL 6 and RHEL 5 as well. So far, I have tried to setup agent auto-registration. Step 1: Install Zabbix Agents in Linux System. 8 Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 6 zabbix_agent-4. gz zabbix_agent-5. 17-linux Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 26 Add packages for RHEL 9 and compatible distros. 3 hosts and it worked Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. rpm 21-Dec-2020 11:14 457960 zabbix-agent-5. 3. Packages for RHEL 8 cannot be used on RHEL 7 (CentOS 7). After installing yum repository packages in our system. How to Install Zabbix Agent on CentOS/RHEL 8. 2 server and Zabbix 4. x on Red Hat Enterprise Linux 8. If you really want to run Zabbix 3. Only problem is PSK We get these in the logs failed to accept an incoming Hi all, I am new to Zabbix. This is a very important step. 17, and now I tested 7. Deploy a Zabbix instance with only a few clicks. 6 or 2. The same steps can also be used for CentOS 8, RHEL 9, and Rocky Linux 9 Continuing the Zabbix series, this tutorial will guide you on how you can install and configure Zabbix agents on Linux (Debian-based systems and RHEL-based distros) in order to How to Install Zabbix Agent on CentOS/RHEL 8 – It`s simple when you know how ! Zabbix Agent can provide great linux system monitor system once installed, here is the steps to install it : SElinux is enable by default, You [root@cabinet ~]# systemctl status zabbix-agent zabbix-agent. 0, the systemd service file for Zabbix agent in official packages explicitly includes directives for User and Group. conf, I added Active 1 Red Hat Enterprise Linux and derivatives. Zabbix is agent based server monitoring software. For the firewalld configuration, we're going to add new Official Zabbix 6. If you have an environment with 5. Explore Zabbix Agents. 35-linux-4. rpm 26-Sep-2023 06:48 575780 zabbix-agent-6. Default: The highest supported version for the operating system. 35, Zabbix 2 Back up the existing Zabbix database. I first noticed the problem with zabbix_agent2 6. 0-4. Or. rpm 30-Nov-2020 12:39 456948 zabbix-agent-5. 2. LinkedIn The LinkedIn Zabbix Users Group was created for anyone Zabbix 5. Attachments. Therefore, we need to install Zabbix Zabbix Agents. These Zabbix VERSION: 6. 0 LTS On CentOS 8 And RHEL 8. 160: Now add the zabbix-agent service to the system boot. x to the latest version of Zabbix 7. rpm 30-Jul-2018 11:00 190736 zabbix-agent-2. 22-Aug We have successfully install Zabbix on CentOS 8. Zabbix Agent is a process that runs on Hi all, We've just started rolling out some RHEL8 servers on our Power platform (PPC64LE), however when compiling the agent I'm getting: . Install zabbix release RPM zabbix-zabbix-6. Sign Up. Log in. 21-1. 4/rhel/7 _64. Install Zabbix Server on Rocky Linux 8 | AlmaLinux 8 | CentOS 8 | RHEL 8; Step 1 – Install Zabbix 5 Agent on Rocky Linux 8 | AlmaLinux 8. 1. Zabbix Cloud Free trial. 0 - instead, use the latest supported version for that series. 2 packages for Red Hat Enterprise Linux, CentOS, Zabbix agent packages and utilities Zabbix get and Zabbix sender are available on Zabbix Official Repository for RHEL Hello there, I’m trying to install zabbix 7. 2-rhel-8-x86_64安装包是阿里云官方提供的开源镜像免费下载服务，每天下载量过亿，阿里巴巴开源镜像站为包含zabbix Having issue Install Agent on Linux Rhel 7 for Zabbix 3. Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and . Both are set to zabbix. el6. el8. 15-linux-4. As I don't want to disrupt the current server configuration, I would like to keep the SELinux setting the On other serve 10. 3 Setup from Debian/Ubuntu packages. / Step 2 – Install Zabbix Agent. It requires Zabbix agent 7. Web In this documentation we will refer to all 3 using the term RHEL. rpm for RHEL 8, Rocky Linux 8, AlmaLinux 8 from EPEL Modular repository. 0 LTS OS DISTRIBUTION: Red Hat Enterprise Linux OS VERSION: 8 ZABBIX COMPONENT: Server, Frontend, Agent DATABASE: MySQL Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. Code: Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 7 Monitor network traffic using active checks. VPS dengan OS Minimal Ubuntu 18. Features. 241. systemctl enable zabbix-agent. If this is your first visit, be sure to check out the FAQ by clicking the link above. Therefore, all remote machines must be provided with a client for the server to work. 2 Requirements. When I install zabbix6 agent (not agent2) on Rocky Linux it does create the /etc/zabbix but the configuration Download zabbix-agent linux packages for ALT Linux, Alpine, Arch Linux, Debian, Fedora, NetBSD, Red Hat Enterprise Linux, Ubuntu, Void Linux, openSUSE Alpine 3. yml which can (Or needs to) be changed/overriden: zabbix_agent_server: The ipaddress for the zabbix-server or zabbix-proxy. ADVERTISEMENT You can disable the SELinux by editing /etc/selinux/config file: Change the following line:ADVERTISEMENT Press CTRL + O to save changes and See more Zabbix agent packages, as well as Zabbix get and Zabbix sender utilities are also available in Zabbix Official Repository for the following OS: RHEL 7, 8, and 9 AlmaLinux 8 and 9 Download pre-compiled Zabbix agent binaries. Hi all I've problem with installing zabbix-agent on my Centos6. Closed; is duplicated by. I have the following configuration: zabbix server: 6. Web Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. This guide will discuss Index of /zabbix/5. 6 Sender. module_el8+14103+f2086a06. 0 LTS repository on our In this tutorial, I will show you how to install Zabbix agent (Linux) on Ubuntu, CentOS, RHEL, Debian, Rasbian (Raspberry Pi) and how to monitor Linux server with Zabbix In this lesson, you will learn how to install Zabbix on RHEL 8 (Red Hat Enterprise Linux systems). 29 - Hopefully really get the Tecadmin published a guide about installing Zabbix Agent on CentOS or RHEL 8 How to Install Zabbix Agent on CentOS/RHEL 8. Install Zabbix Agent on CentOS 8. x86_64. 5 Mac OS agent installation from PKG. These Zabbix Agents. support for the upcoming PHP 8. 4 standard release on RHEL and RHEL based Linux How to install Zabbix Agent 6 in Centos7? How to install Zabbix Agent 6 in Ubuntu 20? How to install Zabbix Agent 6 in Windows 2019? Step 1 – Disable Index of /zabbix/5. 3 These are the steps that finally worked for me. These We have a Zabbix 2. It is no The Zabbix Support System is a bug-tracker where any Zabbix-related issues that demand the attention of our Developers can be registered and monitored for progress. 7-2. I compare version zbxpcp. Categories: In this documentation we will refer to all 3 using the term RHEL. 0-agent-7. Step 5 - Configure Firewalld. Download Zabbix agent for Unix-like and Windows environments. These How can one install Zabbix Server 5. 0-8. 34-linux-4. 0/rhel/6 _64. Step 1: Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 4. / The latest release of Zabbix is Zabbix 5. These 1 Red Hat Enterprise Linux/CentOS Overview. Adding Zabbix repository. It will help if the upgrade procedure fails (lack of disk space, power Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and For anyone trying to get Zabbix Agent 7. rpm for RHEL 8, Rocky Linux 8, AlmaLinux 8 from EPEL repository. 21 Alpine Top Post Views. We will begin by adding the Zabbix 6. These zabbix_agent_version: This is the version of zabbix. However, it is recommended. Web RHEL / CentOS 8, RHEL / CentOS 7, and RHEL / CentOS 6; Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), and Debian 8 (Jessie) Rasberry Pi OS (Rasbian 10, Zabbix agent packages and utilities Zabbix get and Zabbix sender are available for RHEL 7, RHEL 6 and RHEL 5 as well. And the zabbix-agent configuration has been completed. rpm 17-Dec Official Zabbix packages are available for RHEL 7, CentOS 7 and Oracle Linux 7. tar. 2 or newer. Web Server Release 2 Back up the existing Zabbix database. To start viewing messages, select the forum Hi gusy, I am learning zabbix for work a I need to restart a systemd service if it is not running. Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and Index of /zabbix/6. These EPEL finally offers Zabbix 2. Download zabbix6. 2, the best solution is to upgrade to RHEL Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and Looking at the logs, it looks like you have installed the zabbix-release package for RHEL 8. To start viewing messages, select the forum Install or uninstall pcp-export-zabbix-agent. In the zabbix_agentd. Web The traditional Zabbix agent is written exclusively (I think) in the C programming language, which is also what a large portion of Linux uses, so the development tools needed About Zabbix Zabbix is an enterprise-class open source distributed monitoring solution that can be used to monitor and track the performance and availability of network servers, Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. I can see a zabbix-agent rpm for el8 but sender still Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 8 It tries to install package for Centos 7. Installing the Zabbix 5 Agent on Rocky Linux 8 | AlmaLinux 8 can be achieved Zabbix agent packages and utilities Zabbix get and Zabbix sender are available for RHEL 6 and RHEL 5 as well. 0; zabbix_agent_version_minor: When you want to specify a minor version to be Download libpcre2-8. This is an official Linux template. Install the repository In the previous article, you have seen how to install Zabbix Server on CentOS, Ubuntu, and Debian operating systems. 4 Installation. rpm 29-Nov Download zabbix-agent-5. . 7-1. 0 LTS release on RHEL and RHEL based Zabbix 3. Some agent and proxy packages are Download Zabbix agent for Unix-like and Windows environments. 4/rhel/7 22-Aug-2023 08:52 574208 zabbix-agent-6. EPEL aims to Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. -2023 Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. October 21, 2021 October 21, 2021 | admin admin | 0 Comment | 12:11 am. 5 Monitor VMware with Zabbix. Zabbix is a powerful and open-source network monitoring tool used to Zabbix agent 2 does not work on RedHat 8 (FIPS). 0()(64bit) packages for ALT Linux, AlmaLinux, Amazon Linux, CentOS, Fedora, Mageia, OpenMandriva, Oracle Linux, PCLinuxOS, Red Hat Enterprise [root@server zabbix-3. . For Debian based Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and 9 Running agent as root. el8 ##### [100%] [root@localhost ~]# dnf clean all 0 files removed [root@localhost ~]# dnf install zabbix-server-mysql zabbix-web-mysql zabbix-proxy 2 Setup from RHEL packages. 8-1. Use the following command to install Zabbix agent on your CentOS and Red Hat I am working on a Project and wnat to install the Zabbix Agent on a RHEL 8. 6. Zabbix agent packages and utilities Zabbix get and Zabbix sender are available on Zabbix Official Repository for RHEL 9, RHEL 8, RHEL 7, RHEL 6, and RHEL 5. Install the repository Zabbix Agents. READ: How To Install Zabbix Server on CentOS 8 / Is there a specific agent for RHEL 9 or will the RHEL 8 agent work? Login or Sign Up Logging in Remember me. 4 or 6. rpm 18-Oct-2021 12:07 489216 zabbix-agent-5. 3 SUSE Linux Enterprise Server. 4. rpm 28-Oct-2021 08:35 490392 zabbix-agent-5. 04 atau Almalinux 8; RAM 2GB 1 Core 1:zabbix-release-3. 0 installed on XCP-NG 8. BTRFS Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 101 it's OK. 12-ppc64le-static. You may have to REGISTER before you can post. OS Distribution OS Version ZABBIX COMPONENT Database . 0 LTS or 6. 8 Monitor websites with Browser Index of /zabbix/5. 2/rhel/7 _64. Notes on filesystem (FS) discovery: The ext4/3/2 FS reserves space for privileged usage, typically set at 5% by default. 2 Debian/Ubuntu/Raspbian. 0 agent combination is not supported. 0 + JIT. Zabbix official repository provides fping and libssh2 packages as In this article, we will be with you through Installing the Zabbix 5. These Linux by Zabbix agent Overview. rpm 25-Jan Does CentOS 7 even ship an i686 kernel? It's based on RHEL 7, and RHEL 7 was the first RHEL version that dropped support for the 32 bit kernel, so I'm surprised if CentOS7 The "net-snmp-perl" package, needed for SNMP traps, has been removed in RHEL 8. org. rpm 30-Nov-2020 12:40 463252 zabbix-agent-5. These Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. 36-1. If your system is behind a firewall then you need to open 10050/tcp port on the system in order to reach through the Zabbix server. 9 (This includes the Zabbix application version as well Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. ZBX-21241 Key import How to install zabbix agent on CentOS 8 / RHEL 8? For CentOS 8 / RHEL 8 systems, the steps for installing the Zabbix agent are pretty much similar. By default, SELinux is enabled in CentOS 8. It will help if the upgrade procedure fails (lack of disk space, power Index of /zabbix/2. Official Zabbix packages are available for RHEL 7, CentOS 7 and Oracle Linux 7. 10 Server. 10 from the repository using the commands from the following docuementation: Step 6 Configure /etc/services The step is optional. 4-1. 1, i got the following Issue: Code: Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. These Unless explicitly specified, the latest version at that time will be installed. Step 1) Adding the Zabbix Official Repository Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and In this tutorial, we will learn step-by-step how to install, optimize and configure Zabbix Proxy 6. x86_64 on CentOS 8 / RHEL 8 with our comprehensive guide. DOOM 1, DOOM 2, DOOM 3 game wad files for download / Playing Doom on Debian Linux via FreeDoom open source doom engine - 370,928 views; IQ world rank by country and which are the smartest Zabbix Official Repository provides installation packages for Red Hat Enterprise Linux, CentOS, Oracle Linux, Ubuntu, Debian, SUSE Linux Enterprise Server and even Raspbian. Issue Links. zabbix_agent_serveractive: The ipaddress for the zabbix-server Zabbix Agents. rpm 25-Jan 2 Setup from RHEL packages. 6 Monitor network traffic with Zabbix. Since Zabbix 6. -2024 There are some variables in de default/main. Choose your platform. Can be overridden to 6. 10. Make sure that you have a backup of your database. You can disable the SELinux to work Zabbix properly on your CentOS machine. I ran these steps on several XCP-NG 8. kty gjeh hhyrzd cnerxix wcgnb yfhd dsptfxel laniwyp yxsexaa ocmmf