{"id":6687,"date":"2024-01-14T14:39:46","date_gmt":"2024-01-14T21:39:46","guid":{"rendered":"https:\/\/ioflood.com\/blog\/?p=6687"},"modified":"2024-01-14T14:40:39","modified_gmt":"2024-01-14T21:40:39","slug":"install-sar-command-linux","status":"publish","type":"post","link":"https:\/\/ioflood.com\/blog\/install-sar-command-linux\/","title":{"rendered":"Linux ‘SAR’ Command | Installation and Usage Guide"},"content":{"rendered":"
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\"Installation<\/figure>\n<\/div>\n

Are you looking to install the sar<\/code> command on your Linux system but aren’t sure where to start? Many Linux users might find the task intimidating, yet, sar<\/code> is a utility worth mastering. Installing sar<\/code> will make it easy to keep an eye on your Linux system’s activity. SAR<\/code> is readily available on most package management systems, making it a straightforward process once you know-how.<\/p>\n

In this tutorial, we will guide you on how to install the sar<\/code> command on your Linux system.<\/strong> We will show you methods for both APT and YUM-based distributions, delve into compiling sar<\/code> from source, installing a specific version, and finally, how to use the sar<\/code> command and ensure it’s installed correctly.<\/p>\n

So, let’s dive in and begin installing sar<\/code> on your Linux system!<\/p>\n

TL;DR: How Do I Install and Use the ‘sar’ Command in Linux?<\/h2>\n

\n The 'sar'<\/code> command is part of the sysstat package. You can verify this with, sar -V<\/code>. However, if it isn’t installed to your system, you can add it with sudo yum install sysstat<\/code> or sudo apt-get install sysstat<\/code>. To install it on Debian-based distributions like Ubuntu, use the following command:\n<\/p><\/blockquote>\n

sudo apt-get install sysstat\n<\/code><\/pre>\n
For RPM-based distributions like CentOS, use this command:<\/p>\n
sudo yum install sysstat\n<\/code><\/pre>\n
Once installed, you can use sar<\/code> followed by various options to monitor different system activities. For example, to display CPU usage, you can use the following command:<\/p>\n
sar -u\n<\/code><\/pre>\n
This will display the CPU usage statistics.<\/p>\n
# Output:\n# Linux 4.18.0-25-generic (anton-VirtualBox)    07\/04\/2021  _x86_64_    (1 CPU)\n\n# 12:00:01 AM     CPU     %user     %nice   %system   %iowait    %steal     %idle\n# 12:10:01 AM     all      0.33      0.00      0.13      0.00      0.00     99.54\n<\/code><\/pre>\n
This is just a basic way to install and use the sar<\/code> command in Linux, but there’s much more to learn about sar<\/code> and its powerful system monitoring capabilities. Continue reading for more detailed information and advanced usage scenarios.<\/p>\n
Getting Started with SAR Command in Linux<\/h2>\n
The System Activity Report (SAR) is an essential tool for every Linux user, especially system administrators. It collects, reports, and saves system activity information, enabling you to monitor system performance and troubleshoot issues.<\/p>\n
Why use SAR? It’s a versatile tool that provides a wealth of information, from CPU usage and memory paging to disk I\/O, network statistics, and more. With SAR, you can track performance trends and identify bottlenecks, making it a must-have for maintaining a healthy Linux system.<\/p>\n
Installing SAR with APT<\/h3>\n
For Debian-based distributions like Ubuntu, you can install the SAR command, which is part of the sysstat package, using the Advanced Packaging Tool (APT). Here’s how:<\/p>\n
sudo apt-get update\nsudo apt-get install sysstat\n<\/code><\/pre>\n
This will update your package lists and install sysstat. You can verify the installation with the following command:<\/p>\n
sar -V\n<\/code><\/pre>\n
# Output:\n# sysstat version 11.6.3\n# (C) Sebastien Godard (sysstat <at> orange.fr)\n<\/code><\/pre>\n
Installing SAR with YUM<\/h3>\n
For RPM-based distributions like CentOS, you can use the Yellowdog Updater, Modified (YUM) to install sysstat. Here’s the command you need:<\/p>\n
sudo yum install sysstat\n<\/code><\/pre>\n
Again, verify the installation with sar -V<\/code>.<\/p>\n
Monitoring System Activities with SAR<\/h3>\n
Once SAR is installed, you can start monitoring different system activities. For instance, to view CPU usage, use the -u<\/code> option with the sar<\/code> command:<\/p>\n
sar -u\n<\/code><\/pre>\n
# Output:\n# Linux 4.18.0-25-generic (anton-VirtualBox)    07\/04\/2021  _x86_64_    (1 CPU)\n\n# 12:00:01 AM     CPU     %user     %nice   %system   %iowait    %steal     %idle\n# 12:10:01 AM     all      0.33      0.00      0.13      0.00      0.00     99.54\n<\/code><\/pre>\n
This output provides a snapshot of CPU usage at the time the command was run, with statistics for user processes, system processes, idle processes, and more. With these insights, you can start making informed decisions about your system’s performance and resource allocation.<\/p>\n
Installing SAR from Source Code<\/h2>\n
While package managers like APT and YUM make it easy to install SAR, you might want to compile it from source code. Installing from source allows you to customize the installation and get the latest features.<\/p>\n
Here’s how you can do it:<\/p>\n
    \n
  1. First, download the latest source code from the official sysstat GitHub repository<\/a>.<\/p>\n<\/li>\n
  2. \n
    Unpack the downloaded file with the following command:<\/p>\n<\/li>\n<\/ol>\n
     tar -xvf sysstat-XX.XX.tar.gz\n<\/code><\/pre>\n
    Replace XX.XX<\/code> with the version number you downloaded.<\/p>\n
      \n
    1. Navigate to the sysstat directory:<\/li>\n<\/ol>\n
       cd sysstat-XX.XX\/\n<\/code><\/pre>\n
        \n
      1. Compile and install the source code:<\/li>\n<\/ol>\n
        .\/configure\nmake\nsudo make install\n<\/code><\/pre>\n
          \n
        1. Verify the installation:<\/li>\n<\/ol>\n
          sar -V\n<\/code><\/pre>\n
          Installing Different Versions of SAR<\/h2>\n
          Different versions of SAR come with unique features and improvements. Depending on your needs, you might want to install a specific version.<\/p>\n
          Installing Specific Versions from Source Code<\/h3>\n
          To install a specific version from source code, you just need to download the correct version from the sysstat releases<\/a> page on GitHub. Then follow the same steps as above.<\/p>\n
          Installing Specific Versions with APT and YUM<\/h3>\n
          To install a specific version with APT or YUM, you need to specify the version number in the install command. Here’s how:<\/p>\n
          APT<\/h4>\n
          sudo apt-get install sysstat=XX.XX\n<\/code><\/pre>\n
          YUM<\/h4>\n
          sudo yum install sysstat-XX.XX\n<\/code><\/pre>\n
          Remember to replace XX.XX<\/code> with the version number.<\/p>\n
          Version Comparison<\/h3>\n\n\n\n\n\n\n\n
          Version<\/th>\nKey Features<\/th>\nCompatibility<\/th>\n<\/tr>\n<\/thead>\n
          12.0.1<\/td>\nEnhanced network statistics<\/td>\nLinux 2.6.31 or later<\/td>\n<\/tr>\n
          11.4.2<\/td>\nAdded support for persistent device names<\/td>\nLinux 2.6.31 or later<\/td>\n<\/tr>\n
          10.2.1<\/td>\nIntroduced disk and network statistics per partition<\/td>\nLinux 2.6.31 or later<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
          Using SAR and Verifying the Installation<\/h2>\n
          Basic Usage of SAR<\/h3>\n
          You can use SAR to monitor various system activities. For instance, to display memory usage statistics, you can use the -r<\/code> option:<\/p>\n
          sar -r\n<\/code><\/pre>\n
          # Output:\n# Linux 4.18.0-25-generic (anton-VirtualBox)    07\/04\/2021  _x86_64_    (1 CPU)\n\n# kbmemfree kbmemused  %memused kbbuffers  kbcached  kbcommit   %commit  kbactive   kbinact   kbdirty\n# 1618728    611968     27.44     53460    354084     89196      2.15    266628    289444       132\n<\/code><\/pre>\n
          Verifying the Installation<\/h3>\n
          You can verify the correct installation of SAR by checking its version number with the -V<\/code> option:<\/p>\n
          sar -V\n<\/code><\/pre>\n
          # Output:\n# sysstat version 12.1.3\n# (C) Sebastien Godard (sysstat <at> orange.fr)\n<\/code><\/pre>\n
          This output confirms that SAR is installed correctly and displays its version number.<\/p>\n
          Exploring Alternative System Monitoring Tools in Linux<\/h2>\n
          While the sar<\/code> command is a powerful tool for system monitoring in Linux, it’s not the only one available. There are several other commands and tools that you can use to monitor your system’s performance. Let’s explore some of them.<\/p>\n
          The ‘top’ Command<\/h3>\n
          The top<\/code> command is a real-time system monitor that displays a dynamic view of the processes running on a system. It’s one of the most commonly used commands for system monitoring.<\/p>\n
           top\n<\/code><\/pre>\n
          # Output:\n# top - 15:23:33 up  2:00,  1 user,  load average: 0.00, 0.01, 0.05\n# Tasks:  88 total,   2 running,  86 sleeping,   0 stopped,   0 zombie\n# %Cpu(s):  0.7 us,  0.3 sy,  0.0 ni, 98.9 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st\n# MiB Mem :   1990.8 total,   1113.9 free,    507.3 used,    369.6 buff\/cache\n# MiB Swap:   1024.0 total,   1024.0 free,      0.0 used.   1302.0 avail Mem\n<\/code><\/pre>\n
          The top<\/code> command provides a live scrolling view of the current state of the system, and it updates every few seconds. It’s an excellent tool for real-time monitoring and troubleshooting.<\/p>\n
          The ‘vmstat’ Command<\/h3>\n
          The vmstat<\/code> (virtual memory statistics) command provides information about processes, memory, paging, block IO, traps, and cpu activity.<\/p>\n
           vmstat\n<\/code><\/pre>\n
          # Output:\n# procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----\n#  r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st\n#  1  0      0 1139952  55648 363868    0    0    39    35  115  220  1  0 99  0  0\n<\/code><\/pre>\n
          The vmstat<\/code> command is particularly useful for tracking down performance issues related to memory usage.<\/p>\n
          The ‘iostat’ Command<\/h3>\n
          The iostat<\/code> command reports CPU statistics and input\/output statistics for devices and partitions. It’s a part of the sysstat package, just like sar<\/code>.<\/p>\n
           iostat\n<\/code><\/pre>\n
          # Output:\n# Linux 4.18.0-25-generic (anton-VirtualBox)    07\/04\/2021  _x86_64 (1 CPU)\n\n# avg-cpu:  %user   %nice %system %iowait  %steal   %idle\n#            0.33    0.00    0.13    0.00    0.00   99.54\n<\/code><\/pre>\n
          The iostat<\/code> command is useful for monitoring disk I\/O statistics, which can be crucial for performance tuning and troubleshooting.<\/p>\n
          Choosing the Best Tool<\/h3>\n
          Each of these commands has its unique features and use cases. The top<\/code> command is best for real-time monitoring, vmstat<\/code> is excellent for memory-related issues, and iostat<\/code> is ideal for disk I\/O statistics. Meanwhile, sar<\/code> provides a comprehensive view of system performance.<\/p>\n
          Choosing the best tool depends on your specific needs and the kind of information you’re looking for. You might even use a combination of these tools for a more holistic view of your system’s performance.<\/p>\n
          Troubleshooting Common SAR Command Issues<\/h2>\n
          As with any tool, you might encounter some issues when using the sar<\/code> command. Let’s go through some of the common problems and their solutions.<\/p>\n
          SAR Command Not Found<\/h3>\n
          If you encounter a ‘command not found’ error when trying to use sar<\/code>, it’s likely because the sysstat package is not installed. You can confirm this by attempting to display the version of sysstat using the following command:<\/p>\n
          sar -V\n<\/code><\/pre>\n
          # Output:\n# Command 'sar' not found, but can be installed with:\n# sudo apt install sysstat\n<\/code><\/pre>\n
          As the output suggests, you can install sysstat using the package manager for your distribution (APT, YUM, etc.).<\/p>\n
          No Data Available for Today<\/h3>\n
          If you see a ‘No data available for today’ message when running sar<\/code>, it means that the sadc service is not collecting system activity data. You can verify this with the following command:<\/p>\n
          systemctl status sysstat\n<\/code><\/pre>\n
          # Output:\n# \u25cf sysstat.service - Resets System Activity Data Collector\n#    Loaded: loaded (\/lib\/systemd\/system\/sysstat.service; enabled; vendor preset: enabled)\n#    Active: inactive (dead)\n<\/code><\/pre>\n
          If the service is inactive (dead), you can start it with this command:<\/p>\n
          sudo systemctl start sysstat\n<\/code><\/pre>\n
          SAR: Can’t Open \/var\/log\/sysstat\/saXX<\/h3>\n
          If you encounter a ‘Can’t open \/var\/log\/sysstat\/saXX’ error, it means that the SAR utility can’t find the system activity data file for the specified day (XX). This could be because the sysstat service is not running, or the data file has been moved or deleted.<\/p>\n
          You can check if the sysstat service is running with the systemctl status sysstat<\/code> command. If the service is running, you might need to check the \/var\/log\/sysstat\/ directory for the data files.<\/p>\n
          Understanding SAR Output<\/h3>\n
          The sar<\/code> command provides a wealth of information, but it can be overwhelming if you’re not familiar with the terminology. To help you understand the output, here’s a brief explanation of some common terms:<\/p>\n