mirror of
https://github.com/nicolargo/glances.git
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297 lines
8.1 KiB
Markdown
297 lines
8.1 KiB
Markdown
[](https://flattr.com/thing/484466/nicolargoglances-on-GitHub)
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=============================
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Glances -- Eye on your system
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=============================
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## Description
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Glances is a CLI curses based monitoring tool for GNU/Linux and BSD OS.
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Glances uses the PsUtil library to get information from your system.
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It is developed in Python.
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## Installation
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Pre-requisites (information for packagers):
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* Python 2.6+ (not tested with Python 3+)
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* build-essential (fo installation via Pypi and setup.py)
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* python-dev (for installation via Pypi)
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* python-setuptools (for the installation via setup.py)
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* python-psutil 0.4.1+ (replace the old libstatgrab's lib)
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* python-jinja2 2.0+ (optional for HTML export)
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### From package manager (very easy way)
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Packages exist for Arch, Fedora, Redhat, FreeBSD...
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### From PPA (easy way for Ubuntu/Mint...)
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Arnaud Hartmann (thanks to him !) maintains a PPA with the latest Glances version:
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The PPA is available for Ubuntu version 9.10 to 12.04.
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To install the PPA just enter:
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$ sudo add-apt-repository ppa:arnaud-hartmann/glances-stable
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$ sudo apt-get update
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Then install Glances:
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$ sudo apt-get install glances
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### From PyPi (easy way)
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PyPi is an official Python package manager.
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You first need to install pypi on your system. For example on Debian/Ubuntu:
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$ sudo apt-get install python-pip build-essential python-dev
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Then install the latest Glances version:
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$ sudo pip install glances
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### From [Homebrew](http://mxcl.github.com/homebrew/) via PyPi (OS X)
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$ brew install brew-pip
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$ export PYTHONPATH=$(brew --prefix)/lib/python2.7/site-packages
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$ brew pip Glances
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### From source
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Get the latest version:
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$ wget https://github.com/downloads/nicolargo/glances/glances-1.4.tar.gz
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Glances use a standard GNU style installer:
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$ sudo apt-get install python-setuptools build-essential python-dev
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$ tar zxvf glances-1.4.tar.gz
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$ cd glances-1.4
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$ sudo python setup.py install
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## Running
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Easy way (that's all folks !):
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$ glances
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## User guide
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By default, stats are refreshed every second, to change this setting, you can
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use the -t option. For example to set the refrech rate to 5 seconds:
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$ glances -t 5
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Importants stats are colored:
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* GREEN: stat counter is "OK"
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* BLUE: stat counter is "CAREFUL"
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* MAGENTA: stat counter is "WARNING"
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* RED: stat counter is "CRITICAL"
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When Glances is running, you can press:
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* 'h' to display an help message whith the keys you can press
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* 'a' to set the automatic mode. The processes are sorted automatically
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If CPU > 70%, sort by process "CPU consumption"
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If MEM > 70%, sort by process "memory size"
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* 'c' to sort the processes list by CPU consumption
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* 'd' Disable or enable the disk IO stats
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* 'f' Disable or enable the file system stats
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* 'l' Disable or enable the logs
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* 'm' to sort the processes list by process MEM
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* 'n' Disable or enable the network interfaces stats
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* 'p' to sort by process name
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* 'q' Exit
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### Header
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The header shows the host name and the operating system name, version and architecture.
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### CPU
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The CPU states are shown as a percentage and for the configured refresh
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time. The total CPU usage is displayed on the first line.
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If horizontal space is available, per core CPU infomations are displayed.
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Color code used:
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If user|kernel|nice CPU is < 50%, then status is set to "OK".
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If user|kernel|nice CPU is > 50%, then status is set to "CAREFUL".
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If user|kernel|nice CPU is > 70%, then status is set to "WARNING".
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If user|kernel|nice CPU is > 90%, then status is set to "CRITICAL".
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### Load
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On the Nosheep blog, Zach defines the average load: "In short it is the
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average sum of the number of processes waiting in the run-queue plus the
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number currently executing over 1, 5, and 15 minute time periods."
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Glances gets the number of CPU cores to adapt the alerts. With Glances,
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alerts on average load are only set on 5 and 15 mins. The first line
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also display the number of CPU core.
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If average load is < O.7*Core, then status is set to "OK".
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If average load is > O.7*Core, then status is set to "CAREFUL".
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If average load is > 1*Core, then status is set to "WARNING".
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If average load is > 5*Core, then status is set to "CRITICAL".
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### Memory
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Glances uses tree columns: memory (RAM), "real" and swap.
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Real used memory is: used - cache.
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Real free memory is: free + cache.
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With Glances, alerts are only set for on used swap and real memory.
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If memory is < 50%, then status is set to "OK".
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If memory is > 50%, then status is set to "CAREFUL".
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If memory is > 70%, then status is set to "WARNING".
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If memory is > 90%, then status is set to "CRITICAL".
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### Network bit rate
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Glances display the network interface bit rate. The unit is adapted
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dynamicaly (bits per second, Kbits per second, Mbits per second...).
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Alerts are set only if the network interface maximum speed is available.
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If bitrate is < 50%, then status is set to "OK".
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If bitrate is > 50%, then status is set to "CAREFUL".
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If bitrate is > 70%, then status is set to "WARNING".
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If bitrate is > 90%, then status is set to "CRITICAL".
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For example, on a 100 Mbps Ethernet interface, the warning status is set
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if the bit rate is higher than 70 Mbps.
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### Disk I/O
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Glances displays the disk I/O throughput. The unit is adapted dynamicaly
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(bytes per second, Kbytes per second, Mbytes per second...).
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There is no alert on this information.
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### Filesystem
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Glances display the total and used filesytem disk space. The unit is
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adapted dynamicaly (bytes per second, Kbytes per second, Mbytes per
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second...).
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Alerts are set for used disk space:
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If disk used is < 50%, then status is set to "OK".
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If disk used is > 50%, then status is set to "CAREFUL".
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If disk used is > 70%, then status is set to "WARNING".
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If disk used is > 90%, then status is set to "CRITICAL".
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### Processes
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Glances displays a summary and a list of processes.
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By default (or if you hit the 'a' key) the process list is automaticaly
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sorted by CPU of memory consumption.
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The number of processes in the list is adapted to the screen size.
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* VIRT: Virtual memory size (in byte)
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* REST: Amount of resident memory (in byte)
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* CPU%: % of CPU used by the process
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* MEM%: % of MEM used by the process
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* PID: Process ID
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* USER: Process user ID
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* NI: Nice level of the process
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* S: Process status
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R - Running
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D - Sleeping (may not be interrupted)
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S - Sleeping (may be interrupted)
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T - Traced or stopped
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Z - Zombie or "hung" process
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* TIME+: Cumulative CPU time used
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* NAME: Process name or command line
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### Logs
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A logs list is displayed in the bottom of the screen if (and only if):
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* at least one WARNING or CRITICAL alert was occured.
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* space is available in the bottom of the console/terminal
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There is one line per alert with the following information:
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* start date
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* end date
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* alert name
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* (min/avg/max) values
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### Footer
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Glances displays the current time/date and access to the embeded help screen.
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## Localisation
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To generate french locale execute as root or sudo :
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i18n_francais_generate.sh
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To generate spanish locale execute as root or sudo :
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i18n_espanol_generate.sh
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## Todo
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You are welcome to contribute to this software.
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* Code optimization
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* Port to FreeBSD and Mac OS X
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* Documentation for HTML and CVS export option
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