Skip to main content

checking host hardware using linux kernel

How to collect information about  host without trivial system command

  I'm using a lot of hardware boxes with no limit on distro types and versions.  In this case using system command such as ifconfig has a limited usage.  Also,  system config files have a different path and best way for me is getting information from the kernel. Of course,  I'm using cat command for doing this.
Next table has information about hardware. Let me know if something is interesting for you and you know something interesting

hardware information in the linux kernel
file path information
/proc/cpuinfo CPU
/proc/meminfo memory
/sys/block List of block devices. HDD has sd or hd at the beginning
/sys/class/block/{digit}/device/model HDD drive and vendor
/sys/block/{digit}/size HDD size
 /sys/block List of block devices. HDD has sd or hd at the beginning
/sys/bus/pci/devices/0000:{digit}/net System name of the network card
/sys/devices/virtual/dmi/id/board_* Motherboard information
/proc/net/route Netcard names with VLAN datas, network and netmask
/proc/net/fib_trie route caching (also has information about local IPs)
/proc/version kernel version and uptime

Simple bonus

I've written a simple python script for  checking all information at remote host via SSH connection. you need ssh key  for connection only.  Link is here: python code is here.

Comments

Popular posts from this blog

Upgrade postgres 9.4 to 9.6 at Debian linux

I'm using virtual server based on Debian Linux for some my free projects.  One of them is based on Postgres with PostGIS extension.   This windy rainy day is a good time for executing some upgrade. Also I would like to add partman extension for partituoning.
Checking new version. Update package list :
aptitude update Get: 1 http://ftp.debian.org/debian jessie-updates InRelease [145 kB] Get: 2 http://security.debian.org stretch/updates InRelease [62.9 kB] Get: 3 http://security.debian.org jessie/updates InRelease [63.1 kB]
 Check for new version:


dpkg-query -l postgresql* Desired=Unknown/Install/Remove/Purge/Hold| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)||/ Name Version Ar…

Postfix can not start via systemd (simple fix)

Solving problem related to systemd process I like postfix.   This is really smart and secure mail server. I'm helping above  dozen clients around the world and  tunning  postfix is really fun task. This morning I was downgrading postfix  to the stable version for one of the my friends and come across interesting issue. 
root@newserver:/etc/init.d# systemctl status postfix ● postfix.service Loaded: masked (/dev/null; bad) Active: inactive (dead) since вт 2017-06-13 14:35:41 EEST; 1h 48min ago Main PID: 25145 (code=exited, status=0/SUCCESS)чер 13 14:47:09 newserver systemd[1]: Stopped postfix.service.чер 13 14:47:29 newserver systemd[1]: Stopped postfix.service.чер 13 14:58:22 newserver systemd[1]: Stopped postfix.service.чер 13 14:58:23 newserver systemd[1]: Stopped postfix.service.чер 13 15:05:20 newserver systemd[1]: Stopped postfix.service.чер 13 15:29:06 newserver systemd[1]: Stopped postfix.service.чер 13 15:29:06 newserver systemd[1]: Stopped postfix.service.чер 13 15:…

Small python script for monitoring MySQL performance

I have few services which use MySQL as database server. I would like to have information about load in PNG  image  or  in Cacti app.
MySQL   has  performance information at 'SHOW STATUS' command.

Values  which  are monitored : 
 threads_running, threads_connected, thread_cached, slow_queries
 Of course,  it is really easy to add more variables.

Connection to MySQL is accomplished by MySQLdb  module. Typical example of usage is below :
import MySQLdb mydb = MySQLdb.connect(host = 'hostname', user = 'username', password = 'secret', database = 'mysatabase' ) mycursor = mydb.cursor() mycursor.execute('SQL command') sqlresult = cur.fetchall()
Storing data in rrd file is aviable via rrdtools package. This one is present in debian and Centos OS. example of creating file is below: import rrdtool rrdtool.create("myfile.rrd" , "DS:value1:datatype:hea…