• Yor reply looks self contradicting. You start telling SIGKILL always works but end citing the uninterruptible sleep case, where SIGKILL might never work outside.
• Enterprise Manager Documentation. The Oracle Enterprise Manager family of products provides comprehensive enterprise management solutions for today's complex IT.
• A list of the best and most used Linux and Unix-like operating systems performance and information tools with full how to articles.

Search metadata Search full text of books Search TV captions Search archived web sites Advanced Search. CentOS Product Specifications. This page contains an overview on the capabilities and limits of CentOS. We've made a list of some quality open source video players which are available on Linux, based on their usability, user interface, distinctive features, etc. Search the DistroWatch database for distributions using a particular package. If you are looking for a distribution with the latest kernel, select "linux" from the.

Linux Performance Monitoring Tools. Over the time our website has shown you how to configure various performance tools for Linux and Unix- like operating systems. In this article we have made a list of the most used and most useful tools to monitor the performance for your box.

We provided a link for each of them and split them into 2 categories: command lines one and the ones that offer a graphical interface. Command line performance monitoring tools. It adds new features and functionality allowing you to view all the different resources instantly, allowing you to compare and combine the different resource usage.

It uses colors and blocks to help you see the information clearly and easily. It also allows you to export the data in CVS format to review it in a spreadsheet application or import in a database. You can use this application to monitor cpu, memory, eth.

It shows daily logging of system and process activity for long- term analysis and it highlights overloaded system resources by using colors. It includes metrics related to CPU, memory, swap, disks and network layers. All the functions of atop can be accessed by simply running: # atop. And you will be able to use the interactive interface to display and order data.

Nmon - performance monitor for Unix- like systems. Nmon stands for Nigel's Monitor and it's a system monitor tool originally developed for AIX. If features an Online Mode that uses curses for efficient screen handling, which updates the terminal frequently for real- time monitoring and a Capture Mode where the data is saved in a file in CSV format for later processing and graphing. More info in our nmon performance track article.

The command is a top like command but is focused on showing real- time kernel slab cache information. It displays a listing of the top caches sorted by one of the listed sort criteria. It also displays a statistics header filled with slab layer information. Here are a few examples: # slabtop - -sort=a# slabtop - s b# slabtop - s c# slabtop - s l# slabtop - s v# slabtop - s n# slabtop - s o. More info is available kernel slab cache article.

The accounting system, based on the values in the count and interval parameters, writes information the specified number of times spaced at the specified intervals in seconds. If the interval parameter is set to zero, the sar command displays the average statistics for the time since the system was started. Useful commands: # sar - u 2 3# sar –u –f /var/log/sa/sa. P ALL 1 1# sar - r 1 3# sar - W 1 3. Saidar - simple stats monitor. Saidar is a simple and lightweight tool for system information.

It doesn't have major performance reports but it does show the most useful system metrics in a short and nice way. You can easily see the up- time, average load, CPU, memory, processes, disk and network interfaces stats. Usage: saidar . It shows the current list of running processes that the user can order using different criteria. Leaving On The 15Th Spring Download Images. It mainly shows how much CPU and memory is used by the system processes.

You can also find here a list of examples of top usage . You can access it by running the top command and entering the interactive mode: Quick cheat sheet for interactive mode: GLOBAL. Sysdig - Advanced view of system processes. Sysdig is a tool that gives admins and developers unprecedented visibility into the behavior of their systems. The team that develops it wants to improve the way system- level monitoring and troubleshooting is done by offering a unified, coherent, and granular visibility into the storage, processing, network, and memory subsystems making it possible to create trace files for system activity so you can easily analyze it at any time.

Quick examples: # sysdig proc. It also shows various information about the Unix sockets that are open between various programs. It is part of most Linux distributions A lot of the commands are explained in the article on netstat and its various outputs. Most used commands are: $ netstat . It shows various information about the packet content that pass. To make the output useful, it allows you to use various filters to only get the information you wish.

A few examples on how you can use it: # tcpdump - i eth. You can find them described in detail in our article on tcpdump and capturing packets. It is an open source program available on most Linux distributions, Solaris and Free. BSD. It is used to diagnose most memory performance problems and much more. More info in our article on vmstat commands. Because it's a simple tool it can be used to either find quick information about memory usage or it can be used in different scripts and applications.

You can see that this small application has a lot of uses and almost all system admin use this tool daily : -)1. Htop - friendlier top.

Htop is basically an improved version of top showing more stats and in a more colorful way allowing you to sort them in different ways as you can see in our article. It provides a more a more user- friendly interface. You can find more info in our comparison of htop and top. The ss utility is used to dump socket statistics, it allows showing information similar to netstat and its able display more TCP and state information. A few examples: # ss - tnap# ss - tnap. It is used by most Linux distributions and other Unix- like operating systems by system administrators to check what files are open by various processes.# lsof +p process. It shows various current network connection sorted by bandwidth usage or the amount of data uploaded or downloaded.

It also provides various estimations of the time it will take to download them. For more info see article on network traffic with iftop. It supports tuning of various parameters related to timing, protocols, and buffers. For each test it reports the bandwidth, loss, and other parameters. If you wish to use the tool check out our article on how to install and use iperf. Smem - advanced memory reporting. Smem is one of the most advanced tools for Linux command line, it offers information about the actual memory that is used and shared in the system, attempting to provide a more realistic image of the actual memory being used.

Icinga - community fork of Nagios. Icinga is free and open source system and network monitoring application. Bulletproof Ftp Server 2011 For Windows Cracker here. It’s a fork of Nagios retaining most of the existing features of its predecessor and building on them to add many long awaited patches and features requested by the user community. More info about installing and configuring can be found in our Icinga article. Nagios - the most popular monitoring tool. The most used and popular monitoring solution found on Linux.

It has a daemon that collects information about various process and has the ability to collect information from remote hosts. All the information is then provided via a nice and powerful web interface. You can find information on how to install Nagios in our article. Linux process explorer - procexp for Linux. Linux process explorer is a graphical process explorer for Linux.

It shows various process information like the process tree, TCP/IP connections and performance figures for each process. It's a replica of procexp found in Windows and developed by Sysinternals and aims to be more user friendly then top and ps. Check our linux process explorer article for more info. Collectl - performance monitoring tool. This is a performance monitoring tool that you can use either in an interactive mode or you can have it write reports to disk and access them with a web server.

It reports statistics on CPU, disk, memory, network, nfs, process, slabs and more in easy to read and manage format. More info in our Collectl article. MRTG - the classic graph tool. This is a network traffic monitor that will provide you graphs using the rrdtool. It is one of the oldest tools that provides graphics and is one of the most used on Unix- like operating systems. Check our article on how to use MRTG for information on the installation and configuration process.

Monit - simple and easy to use monitor tool.

How to set up a Samba file server to use with Windows clients. According to the Samba project web site, Samba is an open source/free software suite that provides seamless file and print services to SMB/CIFS clients. For these reasons, Samba is the preferred solution for a file server in networks where different operating systems (other than Linux) coexist - the most common setup being the case of multiple Microsoft Windows clients accessing a Linux server where Samba is installed, which is the situation we are going to deal with in this article. Please note that on the other hand, if our network consists of only Unix- based clients (such as Linux, AIX, or Solaris, to name a few examples), we can consider using NFS (although Samba is still an option in this case), which has greater reported speeds.

Installing Samba in Debian and Cent. OSBefore we proceed with the installation, we can use our operating system's package management system to look for information about Samba: On Debian: # aptitude show samba.

On Cent. OS: # yum info samba. In the following screenshot we can see the output of 'aptitude show samba' ('yum info samba' yields similar results): Now let's install Samba (the screenshot below corresponds to the installation on a Debian 7 .

We will be prompted to enter a password (which does not necessarily have to be the same as the password of the local Unix account). Finally, we will give access to user xmodulo to a directory within our system that will be used as a Samba share for him (and other users as well, if needed). This is done by opening the /etc/samba/smb. Vim), navigating to the end of the file, and creating a section (enclose name between square brackets) with a descriptive name, such as . We will open the change.

Notepad++: and try to save it in Z: \ as a plain text file (. Linux: Enabling quotas. As a first step, we need to verify whether the current kernel has been compiled with quota support. Then, we will generate the table of current disk usage per file system with quotas enabled. Even though we have enabled quotas for the /home file system, we have not yet set any limits for any user or group.