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check_linux_stats Featured Popular

77 votes
Current Version
Last Release Date
Compatible With
  • Nagios 2.x
  • Nagios 3.x
  • Nagios 4.x
  • Nagios XI

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Plugin to check linux system performance (cpu, mem, load, disk usage, disk io, network usage, open files and processes).
A perl plugin using Sys::Statistics::Linux

Thanks to Jonny Schulz, the author of Sys::Statistics::Linux, for his great work ( !

v1.2 Changelog :
- Add Paging statistics
- Add swapused and active memory on perfparse statistics
- Remove unused -H option (mthuijs)
v1.3 Changelog :
- Add uptime check, warning threshold in minutes (csterley)
- Replace /usr/local/nagios/libexec with FindBin (eulen)
- Fix reports network traffic in bytes (dbsanders)
v1.4 Changelog :
- Illegal division by zero (helium_rday, RedFish)
- Get the cache out of the used memory (waterdeep, dbsanders)
- Removed unused $return_str on check io disk (RedFish)
- Add steal cpu statistics
v1.5 Changelog :
- Add paging statistics to check for major faults (
- bug, when using unit=MB for disk usage, the perf data writtens only KB (john12)
- Bug, multiple pipe on IO perfcournter (ledistordu)
- Add CPU context switch statistics
Usage :
-h, --help
print this help message
-C, --cpu
check cpu usage
-P, --proc
check the processes number
-M, --memory
check memory usage (memory used, swap used and memory cached)
-N, --network=NETWORK USAGE
check network usage in resq or bytes (default bytes)
-D, --disk=DISK USAGE
check disk usage
check disk I/O (r/w on /dev/sd*)
check load average
-F, --file=FILE STATS
check open files (file alloc, inode alloc)
-S, --socket=SOCKET STATS
socket usage (tcp, udp, raw)
check CPU context switch
-U, --uptime
-p, --pattern
-w, --warning
warning thresold
-c, --critical
critical thresold
-s, --sleep
default 1 sec.
-u, --unit
%, KB, MB or GB left on disk usage, default : MB
REQS OR BYTES on disk io statistics, default : REQS
-V, --version
version number

ex :
* Cpu usage :
./ -C -w 90 -c 100 -s 5
CPU OK : idle 99.80% | user=0.00% system=0.20% iowait=0.00% idle=99.80%;90;100

* Load average :
./ -L -w 10,8,5 -c 20,18,15
LOAD AVERAGE OK : 0.20,0.07,0.16 | load1=0.20;10;20;0 load5=0.07;8;18;0 load15=0.16;5;15;0

* Memory usage :
./ -M -w 99,50 -c 100,50
MEMORY OK : Mem used=92.57%, Swap used=0.01% |MemUsed=92.57%;95;99 SwapUsed=0.01;50;50 MemCached=12.62 SwapCached=0.00 Active=12.61

* Disk usage :
./ -D -w 10 -c 5 -p /,/usr,/tmp,/var
DISK WARNING used : / 3331.80MB on 3875.09MB (8.86% free) /usr 10084.27MB on 14528.41MB (25.43% free)| /=3331.80MB /usr=10084.27MB

* Disk I/O :
./ -I -w 100,70 -c 150,100 -p sda1,sda2,sda4
DISK I/O OK | sda2_read=0.00;100;150 sda2_write=0.00;70;100 sda4_read=0.00;100;150 sda4_write=0.00;70;100 sda1_read=0.00;100;150 sda1_write=0.00;70;100

* Network usage :
./ -N -w 30000 -c 45000 -p eth0
NET USAGE OK eth0:8021.78KB | eth0_txbyt=3461.39KB eth0_txerrs=0.00KB eth0_rxbyt=4560.40KB eth0_rxerrs=0.00KB

* Open files :
./ -F -w 10000,150000 -c 15000,250000
OPEN FILES OK allocated: 1728 (inodes: 70390) | fhalloc=1728;10000;15000;411810 inalloc=70390;150000;250000;100250 dentries=50754

* Socket usage :
./ -S -w 1000 -c 2000
SOCKET USAGE OK : used 257 |used=257;1000;2000 tcp=18 udp=5 raw=0

* Number of procs :
./ -P -w 1000 -c 2000
PROCS OK : count 272 |count=272;1000;2000 runqueue=2 blocked=0 running=2 new=0.98

* Process mem & cpu :
./ -T -w 2000000000 -c 3000000000 -p /var/run/
PROCESSES OK | java_vsize=1804918784;2000000000;3000000000 java_nswap=0 java_cnswap=0 java_cpu=0

* Paging statistics :
./ -W -w 10,1000,1 -c 20,2000,20 -s 3
Paging OK : in:0.00,out:0.00,flt:0.00 |pgpgin=0.00;10;20;0 pgpgout=0.00;1000;2000;0 pgmajfault=0.00;1;20;0 pswpin=0.00 pswpout=0.00

* Cpu context switch :
./ -X -w 6000 -c 70000 -s 2
CONTEXT SWITCH OK : context 80|ctxt=80

* Uptime :
./ -U -w 9
WARNING : up 0 days, 00:08:16 |uptime=496.05

Reviews (47)
bySushilR, August 8, 2012

Please let me know what is means.. -L -w 10,8,5 -c 20,18,15 --- for Load

Please reply to me on
Owner's reply


This format is the same as the default format that is used by the command 'uptime', 'w', or 'cat /proc/loadavg'

./ -L -w wload1,wload5,wload15 -c cload,cload5,cload15

bymik, July 29, 2012
1 of 1 people found this review helpful
Very nice plugin!

But how to use for remote hosts and syntax in
Thanks a lot!
Owner's reply


Did you try nrpe (or nsca) :

# command.cfg on nagios server
# $ARG1$ = check_cpu_usage,check_mem_usage,etc..

define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$

# nrpe.cfg on the remote server
command[check_cpu_usage]=/usr/local/nagios/libexec/ -C -w 90 -c 100 -s 5

command[check_load_average]=/usr/local/nagios/libexec/ -L -w 10,8,5 -c 20,18,15

command[check_memory_usage]=/usr/local/nagios/libexec/ -M -w 99,50 -c 100,50

command[check_disk_usage]=/usr/local/nagios/libexec/ -D -w 10 -c 5 -p /,/usr,/tmp,/var

command[check_disk_io]=/usr/local/nagios/libexec/ -I -w 100,70 -c 150,100 -p sda1,sda2,sda4

command[check_network_usage]=/usr/local/nagios/libexec/ -N -w 30000 -c 45000 -p eth0

command[check_open_files]=/usr/local/nagios/libexec/ -F -w 10000,150000 -c 15000,250000

command[check_socket_usage]=/usr/local/nagios/libexec/ -S -w 1000 -c 2000

command[check_number_procs]=/usr/local/nagios/libexec/ -P -w 1000 -c 2000

bymthuijs, January 22, 2012
1 of 1 people found this review helpful

The Usage message for the script suggests there is a "-H " option, but it doesnt appear to be actually implemented. Any chance you have a version in the pipeline that will have that working? At the moment I would need too use NRPE to utilise this plugin. No biggie I suppose, but a "-H" option would mean I dont need to configure NRPE on all linux hosts.

byhedkandi, December 19, 2011
1 of 2 people found this review helpful
Well, i have the same query as the guy do i generate the graph? it works fine so far with command configs but the graph part i have no idea how to go by it! please assist!
Owner's reply

Hi, you mean the plugin returns perfdata but you cannot getting graph in nagios ?

bybloonix, November 17, 2011
0 of 1 people found this review helpful
Hi, this is a really nice plugin based on my module Sys::Statistics::Linux. You should also view the original bloonix plugins on Note that the statistic output is in YAML format.
bywush, August 1, 2011
0 of 1 people found this review helpful
install the package libsys-statistics-linux-perl, it comes with /usr/share/perl5/Sys/Statistics/

but how can i use the graph?
byfogier, July 8, 2011
4 of 4 people found this review helpful
When i do a local check with the example
./ -C -w 90 -c 100 -s 5
I get a error (see underneath).
It seems he misses a perl module. Is this right?
I could find a perl-Sys-Statistics-Linux rpm (I'm on SLES 10 SP2). Do I have to install this?

Can't locate Sys/Statistics/ in @INC (@INC contains: /usr/local/nagios/libexec /usr/lib/perl5/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/5.8.8 /usr/lib/perl5/site_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl .) at ./ line 31.
BEGIN failed--compilation aborted at ./ line 31.
Owner's reply

Right, you must install Sys-Statistics-Linux perl package.
See on CPAN :

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