]> &Chris.Schlaeger;&Chris.Schlaeger.mail; &Chris.Schlaeger;&Chris.Schlaeger.mail; &Tobias.Koenig;&Tobias.Koenig.mail; JohnKnight

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Conversion to British English 2000 &Chris.Schlaeger; &FDLNotice; 2000-12-14 1.00.00 &ksysguard; is a network enabled task manager and system monitor application, with the additional functionality of top. KDE KSysGuard process monitor top ps &ksysguard; is the &kde; Task Manager and Performance Monitor. It features a client/server architecture that allows monitoring of local as well as remote hosts. The graphical front end uses so-called sensors to retrieve the information it displays. A sensor can return simple values or more complex information like tables. For each type of information, one or more displays are provided. Displays are organised in work sheets that can be saved and loaded independently from each other. So, &ksysguard; is not only a simple task manager but also a very powerful tool to control large server farms. &ksysguard; can be started from the start menu, using the entry KDE System Guard in the Systems menu. Alternatively, you can start it by typing ksysguard in a terminal. The &ksysguard; main window consists of a menu bar, an optional tool bar and status bar, the sensor browser and the work space. When first started you see your local machine listed as localhost in the sensor browser and 2 pages in the work space area. This is the default setup. This default setup is sufficient enough for an inexperienced user to do some system management. An experienced user or even a system administrator of a large computer lab has different needs. To address a wide range of users, &ksysguard; is highly flexible. The sensor browser displays the registered hosts and their sensors in a tree form. Click on the tree handles to open or close a branch. Each sensor monitors a certain system value. To connect to a new host use Connect Hosts from the File menu. A dialogue box will appear and allows you to enter the name of the host you want to connect to. Below the name you can choose the connection method. The default is ssh, the secure shell. Alternatively the rsh, the remote shell, or the daemon mode can be used. Click OK to establish the connection. Shortly afterwards the new host will appear in the sensor browser and you can browse the list of sensors. To establish a connection, a program called ksysguardd, that can be started in the following two modes, must be installed on the new host. daemon mode You can start ksysguardd at boot time in Daemon mode by adding -d as the argument. In this case, you have to select daemon mode at the connection dialogue of ksysguard. A disadvantage of this connection type is that you won't be able to kill or renice a process with the Process Controller and the data exchange over network won't be encrypted. shell mode In this mode ksysguardd is started at connecting time by ksysguard. To make that possible, its location needs to be included in your PATH. Unfortunately the ssh does not source your .profile file, so your regular PATH setting will not be available. Instead it uses a default PATH like /bin:/usr/bin. Since it is very likely that &kde; is not installed in these folders you need to create or update a file in your home folder. The file is called environment and needs to be in a hidden folder called .ssh. See the manual page for ssh for more details. The file needs to contain a line similar to: PATH=/bin:/usr/bin:/opt/kde/bin assuming that ksysguardd can be found under /opt/kde/bin/ksysguardd. When using ssh you should make sure that you have your identity.pub installed on the remote machine and the host key of the remote machine is already registered on your machine. The easiest way to check this is to type ssh remotehost ksysguardd in a shell. If you are greeted by ksysguardd you can type quit and everything is in order. For experts: ksysguardd is a very small program that is only linked against the libc. So it can also be used on machines that do not have a fully blown &kde; installation, such as servers. If you choose the custom command option in the host connector you need to specify the complete command to start ksysguardd. To disconnect from a host, select the host in the sensor browser and choose Disconnect Host from the File menu. If you still have sensors in use, the display frames will be greyed and the displays won't update any longer. The work space is organised as work sheets. Select New from the File menu to create a new work sheet. A dialogue will appear where you can set the name, the dimension and the update interval of the work sheet. To remove a work sheet again, select Close from the File menu. Any modifications will be saved to the work sheet file. If a work sheet has never been saved, you will be asked for a file name. Work sheets consist of cells organised as a grid. Each cell can be filled with a display for one or more sensors. You can fill a cell by dragging a sensor from the sensor browser and dropping it over the cell. If there is more than one type of display available for that type of sensor, a popup menu will appear. You can then select which display you prefer to use. Certain types of displays can display more than one sensor. Add more sensors to a display by dragging them over from the sensor browser and dropping them over the already existing display. Work sheets can be configured by clicking Configure Worksheet at the Edit menu. In the appearing dialogue you can set the dimension and the update interval. This update interval is used by all displays of the worksheet, which has the use update interval of worksheet set in its timer configuration dialogue. The entry Configure Style of the Settings menu gives you the possibility to configure the global style attributes and apply them to the current active worksheet. Displays can be configured by clicking with the right mouse button on them. A popup menu appear where you can select whether you want to change the properties of that display, remove it from the work sheet, change its update interval type and value or pause and restart its updating. The signal plotter prints samples of one or more sensors over time. If, several sensors are displayed, the values are piled in different colours. If the display is large enough a grid will be displayed to show the range of the plotted samples. By default, the automatic range mode is active so the minimum and maximum values will be set automatically. Sometimes you want fixed minimum and maximum values. In that case, you can deactivate automatic range mode and set the values in the properties dialogue. The multimeter displays the sensor values as a digital meter. In the properties dialogue you can specify a lower and upper limit. If the range is exceeded, the display is coloured in the alarm colour. The Process Controller gives you a list of processes on your system. The list can be sorted by each column. Just press the left mouse button at the head of the column. The list shows the following information about each process. Please note that not all properties are available on every operating system. Name The name of the executable that started the process. PID The Process ID. A unique number for each process. PPID The Process ID of the process parent. UID The ID of the user that started the process. GID The ID of the group the process belongs to. Status The process status. User% The processor load of the process in user space (in percent). System% The processor load of the process in system space (in percent). Nice The scheduling priority. VmSize The total amount of virtual memory used by the process (in kBytes). VmRss The total amount of physical memory used by the process (in kBytes). Login The login name of the user that started the process. Command The complete start command of the process. Underneath the table you find four buttons which will be described now from left to right. The tree view has been designed to show the relationships between the running processes. A process that is started by another process is called the child of that process. A tree is an elegant way to show this parent-child relationship. The init process is the ancestor of all processes. If you are not interested in the children of a particular process you can click on the little box to the left of the parent and the subtree will collapse. Another click on that box will unfold the subtree again. The Process Filter can be used to reduce the number of processes displayed in the table. You can filter out processes you are not interested in. Currently you can display all processes, system processes only, user processes only or your processes only. This button can be used to force an immediate update of the process list. If you have selected one or more processes you can press the kill button to kill them. A so called SIGKIL is sent to the processes which causes them to terminate immediately. If these applications still have unsaved data this data will be lost. So use this button with care. The bargraph displays the sensor values as dancing bars. In the properties dialogue you can specify minimum and maximum values of range and a lower and upper limit. If the range is exceeded, the display is coloured in the alarm colour. The sensor logger does not display any values, but logs them in a file with additional date and time information. For each sensor you can specify a lower and upper limit in the properties dialogue. If the range is exceeded, the entry of the sensor table is coloured in the alarm colour and a knotify event is sent. The log file monitor displays the content of a file ⪚ /var/log/messages. In the properties dialogue, you can compose a list of regular expressions that will be compared with the content of the file. If one of the expressions match, a knotify event will be sent. The listview displays the data of some sensors in the form of a table. The graphical front-end is available on any platform that &kde; runs on. The back-end is at the moment available on the following flavours of &UNIX;: &Linux; 2.x For ksysguardd to work it is necessary to compile the &Linux; Kernel with the /proc Filesystem enabled. This is the default setting and most &Linux; Distributions have it already. FreeBSD The ksysguardd program needs to be owned by the kmem group and needs to have the setgid bit set. &Solaris; To be written Support for other platforms is in progress. Your help is greatly appreciated. &ksysguard; is currently developed and maintained by Chris Schläger cs@kde.org. &ksysguard; is a rewrite of KTop, the KDE 1.x task manager. Several other people have worked on KTop: A. Sanda alex@darkstar.ping.at Ralf Mueller ralf@bj-ig.de Bernd Johannes Wuebben wuebben@math.cornell.edu Nicolas Leclercq nicknet@planete.net The porting to other platforms than &Linux; was done by: FreeBSD: Hans Petter Bieker zerium@traad.lavvu.no &underFDL; &underGPL;