This is a shell script return 2 values one for packet loss percentage and another for True or False :
SERVER_IP=$1
checkip=`ping -c 2 -W 2 $SERVER_IP | grep "packet loss" | cut -d " " -f 6 | cut -d "%" -f1`
test1=$?
echo $checkip
if [ $test1 -eq 0 ]; then
echo "1"
else
echo "0"
fi
in zabbix when you create an item you enter only one parameter with value but i have 2 values one packet loss and second for ping result (0 and 1)
how can i create two items 1 for packet lost percentage and second for ping health check with only this script? i dont want to create another one
Thanks to Andre
try this script this will guide you to what exactly you want :
#!/bin/bash
case $1 in
packetloss) ping -c2 -W1 -q 8.8.8.8 | grep -oP '\d+(?=% packet loss)' ;;
timeout) ping -c2 -q 8.8.8.8 | grep 'time' | awk -F',' '{ print$4}' | awk '{print $2}' | cut -c 1-4 ;;
*) echo "Use: packetloss , timeout";;
esac
try (im in zsh):
zabbix_agentd -t ping.loss\[timeout\]
ping.loss[timeout] [t|1000]
or in zabbix server use get ( im also in zsh here too):
zabbix_get -s 172.20.4.49 -k ping.loss\[timeout\]
1001
now create items with these keys.
UserParameter=key[*],/path_of_script.sh $1
At the GUI:
Key: key[Server_IP]
Another example:
UserParameter=general[*],/usr/local/etc/scripts/general.sh $1 $2 $3 $4 $5 $6 $7 $8 $9
$ cat general.sh
#!/bin/bash
case $1 in
ddate) ddate;;
minute) echo "`date +%M`%2" | bc;;
files) ls -l $2 | grep ^- | wc -l;;
size.dir) du -s $2 | cut -f1;;
script) /bin/bash /usr/local/etc/scripts/script.sh;;
*) echo "Use: ddate, minute, files <parameters>, size.dir <parameters> or script";;
esac
$ zabbix_get -s Server_IP -k general[minute]
Related
Context
Got a daft script that checks a process is running on a group of hosts, like a watchdog, as I say it's a daft script so bear in mind it isn't 'perfect' by scripting standards
Problem
I've ran bash -x and can see that the script finishes its first check without actually redirecting the output of the command to the file which is very frustrating, it means each host is actually being evaluated to the last hosts output
Code
#!/bin/bash
FILE='OUTPUT'
for host in $(cat /etc/hosts | grep webserver.[2][1-2][0-2][0-9] | awk {' print $2 ' })
do ssh -n -f $host -i <sshkey> 'ps ax | grep myprocess | wc -l' > $FILE 2> /dev/null
cat $FILE
if grep '1' $FILE ; then
echo "Process is NOT running on $host"
cat $FILE
else
cat $FILE
echo "ALL OK on $host"
fi
cat $FILE
done
Script traceback
++ cat /etc/hosts
++ awk '{ print $2 }'
++ grep 'webserver.[2][1-2][0-2][0-9]'
+ for host in '$(cat /etc/hosts | grep webserver.[2][1-2][0-2][0-9] | awk {'\'' print $2 '\''})'
+ ssh -n -f webserver.2100 -i <omitted> 'ps ax | grep myprocess | wc -l'
+ cat OUTPUT
+ grep 1 OUTPUT
+ cat OUTPUT
+ echo 'ALL OK on webserver.2100'
ALL OK on webserver.2100
+ cat OUTPUT
+ printf 'webserver.2100 checked \n'
webserver.2100 checked
+ for host in '$(cat /etc/hosts | grep webserver.[2][1-2][0-2][0-9] | awk {'\'' print $2 '\''})'
+ ssh -n -f webserver.2101 -i <omitted> 'ps ax | grep myprocess | wc -l'
+ cat OUTPUT
2
+ grep 1 OUTPUT
+ cat OUTPUT
2
+ echo 'ALL OK on webserver.2101'
ALL OK on webserver.2101
+ cat OUTPUT
2
+ printf 'webserver.2101 checked \n'
webserver.2101 checked
Issue
As you can see, it's registering nothing for the first host, then after it is done, it's piping the data into the file, then the second host is being evaluated for the previous hosts data...
I suspect its to do with redirection, but in my eyes this should work, it doesn't so it's frustrating.
I think you're assuming that ps ax | grep myprocess will always return at least one line (the grep process). I'm not sure that's true. I'd rewrite that like this:
awk '/webserver.[2][1-2][0-2][0-9]/ {print $2}' /etc/hosts | while IFS= read -r host; do
output=$( ssh -n -f "$host" -i "$sshkey" 'ps ax | grep "[m]yprocess"' )
if [[ -z "$output" ]]; then
echo "Process is NOT running on $host"
else
echo "ALL OK on $host"
fi
done
This trick ps ax | grep "[m]yprocess" effectively removes the grep process from the ps output:
the string "myprocess" matches the regular expression "[m]yprocess" (that's the running "myprocess" process), but
the string "[m]yprocess" does not match the regular expression "[m]yprocess" (that's the running "grep" process)
I need some help . I want the result will be
UP:N%:N%
but the current result is
UP:N%
:N%
this is the code.
#!/bin/bash
UP=$(pgrep mysql | wc -l);
if [ "$UP" -ne 1 ];
then
echo -n "DOWN"
else
echo -n "UP:"
fi
df -hl | grep 'sda1' | awk ' {percent+=$5;} END{print percent"%"}'| column -t && echo -n ":"
top -bn2 | grep "Cpu(s)" | \sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | \awk 'END{print 100 - $1"%"}'
You can use command substitution in your first sentence (notice you're creating a subshell in this way):
echo -n $(df -hl | grep 'sda1' | awk ' {percent+=$5;} END{print percent"%"}'| column -t ):
I have the following script which sends the results of an iwlist scan via OSC:
#!/bin/bash
NUM_BANKS=20
while [[ "$input" != "\e" ]] ; do
networks=$(iwlist wlan0 scanning | awk 'BEGIN{ FS="[:=]"; OFS = " " }
/ESSID/{
#gsub(/ /,"\\ ",$2)
#gsub(/\"/,"",$2)
essid[c++]=$2
}
/Address/{
gsub(/.*Address: /,"")
address[a++]=$0
}
/Encryption key/{ encryption[d++]=$2 }
/Quality/{
gsub(/ dBm /,"")
signal[b++]=$3
}
END {
for( c in essid ) { print "/wlan_scan ",essid[c],signal[c],encryption[c] }
}'
)
read -t 0.1 input
echo "$networks" | while read network; do
set $network
hash=` echo "$2" | md5sum | awk '{ print $1 }'| tr '[:lower:]' '[:upper:]'`
bank=`echo "ibase=16;obase=A; $hash%$NUM_BANKS " | bc`
echo "$1$bank $2 $3 $4"
echo "$1$bank $2 $3 $4" | sendOSC -h localhost 9997
done
#echo "$networks" | sendOSC -h localhost 9997
done
An example of the output from this is '/wlan_scan13 BTHomehub757 -85 On', which is then sent via the sendOSC program.
I basically need to replace the iwlist scan data with the results of this tshark scan:
sudo tshark -I -i en1 -T fields -e wlan.sa_resolved -e wlan_mgt.ssid -e radiotap.dbm_antsignal type mgt subtype probe
which similarly outputs two strings and an int, outputting a result like:
'Hewlett-_91:fa:xx EE-BrightBox-mjmxxx -78'.
So eventually I want the script to give me an output in this instance of
'/wlan13 Hewlett-_91:fa:xx EE-BrightBox-mjmxxx -78'.
Both scans constantly generate results in this format at about the same rate, updating as new wifi routers are detected, and these are sent out as soon as they arrive over the sendOSC program.
This is probably a pretty simple edit for an experienced coder, but I've been trying to work this out for days and I figured I should ask for help!
If someone could clarify what needs to stay and what needs to go here I'd really appreciate it.
Many thanks.
Do you really want to replace commands? The sane approach would seem to be to add an option to the script to specify which piece of code to run, and include them both.
# TODO: replace with proper option parsing
case $1 in
--tshark) command=tshark_networks; shift;;
*) command=iwlist_networks;;
esac
tshark_networks () {
sudo tshark -I -i en1 -T fields \
-e wlan.sa_resolved \
-e wlan_mgt.ssid \
-e radiotap.dbm_antsignal type mgt subtype probe
}
iwlist_networks () {
iwlist wlan0 scanning | awk .... long Awk script here ....
}
while [[ "$input" != "\e" ]] ; do
networks=$($command)
read -t 0.1 input
echo "$networks" | while read network; do
: the rest as before, except fix your indentation
This also has the nice side effect that the hideous iwlist command is encapsulated in its own function, outside of the main loop.
... Well, in fact, I might refactor the main loop to
while true; do
$command |
while read a b c d; do
hash=$(echo "$b" | md5sum | awk '{ print toupper($1) }')
bank=$(echo "ibase=16;obase=A; $hash%$NUM_BANKS " | bc)
echo "$a$bank $b $c $d"
echo "$a$bank $b $c $d" | sendOSC -h localhost 9997
done
read -t 0.1 input
case $input in '\e') break;; esac
done
I have created a script that will check to see if a user you provide is logged on and display the duration of the session if logged on. What i need to do now is if no argument (username) is provided when the command is issued, ask for one and have the same results as if you have provided one.
Here is what I have:
name=$(cat /etc/passwd | grep $1 | cut -d':' -f5 | tr ':' ' ' | sed 's/,//' | sed 's/^\([^ ]*\) \([^ ]*\)/\2 \1/' | sort -t' ' -k3,3)
terminal=$(who | grep $1 | cut -d' ' -f3)
loginHour=$(who | grep $1 | cut -c30-31)
loginMin=$(who | grep $1 | cut -c33-34)
loginMins=$((loginHour * 60 + loginMin))
nowHour=$(date +%R | cut -c1-2)
nowMin=$(date +%R | cut -c4-5)
nowMins=$((nowHour * 60 + nowMin))
totalMins=$((nowMins - loginMins))
hoursOn=$((totalMins / 60))
minsOn=$((totalMins % 60))
clear
echo
if [[ $# -eq 1 ]] ; then
grep -q $1 /etc/passwd
if grep -q $1 /etc/passwd ; then
clear
echo
if who | grep $1 > /dev/null ; then
echo "$name" is currently logged on to terminal "$terminal" and has been for "$hoursOn" hour"(s)" and "$minsOn" minute"(s)".
echo
exit 0
else
echo "$name" is NOT currently logged on.
echo
exit 1
fi
else
echo The user you entered is not a valid user on this system.
echo
exit 2
fi
fi
I had an attempt before but was not the desired result so I removed it out of confusion.
if [[ $# -eq 0 ]]
then
read -p "Enter Name: " username
else
username=$1
fi
then replace all subsequent references to $1 by $username
You can also abort if no name given
# : does nothing it just forces the evaluation
: ${1:?"Need to provide name to script"}
I have a problem that I can't solve, so I've come to you.
I need to write a program that will read all processes and a program must sort them by users and for each user it must display how much of a memory is used.
For example:
user1: 120MB
user2: 300MB
user3: 50MB
total: 470MB
I was thinking to do this with ps aux command and then get out pid and user with awk command. Then with pmap I just need to get total memory usage of a process.
it's just a little update, users are automatically selected
#!/bin/bash
function mem_per_user {
# take username as only parameter
local user=$1
# get all pid's of a specific user
# you may elaborate the if statement in awk obey your own rules
pids=`ps aux | awk -v username=$user '{if ($1 == username) {print $2}}'`
local totalmem=0
for pid in $pids
do
mem=`pmap $pid | tail -1 | \
awk '{pos = match($2, /([0-9]*)K/, mem); if (pos > 0) print mem[1]}'`
# when variable properly set
if [ ! -z $mem ]
then
totalmem=$(( totalmem + $mem))
fi
done
echo $totalmem
}
total_mem=0
for username in `ps aux | awk '{ print $1 }' | tail -n +2 | sort | uniq`
do
per_user_memory=0
per_user_memory=$(mem_per_user $username)
if [ "$per_user_memory" -gt 0 ]
then
total_mem=$(( $total_mem + $per_user_memory))
echo "$username: $per_user_memory KB"
fi
done
echo "Total: $total_mem KB"
Try this script, which may solve your problem:
#!/bin/bash
function mem_per_user {
# take username as only parameter
local user=$1
# get all pid's of a specific user
# you may elaborate the if statement in awk obey your own rules
pids=`ps aux | awk -v username=$user '{if ($1 == username) {print $2}}'`
local totalmem=0
for pid in $pids
do
mem=`pmap $pid | tail -1 | \
awk '{pos = match($2, /([0-9]*)K/, mem); if (pos > 0) print mem[1]}'`
# when variable properly set
if [ ! -z $mem ]
then
totalmem=$(( totalmem + $mem))
fi
done
echo $totalmem
}
total_mem=0
for i in `seq 1 $#`
do
per_user_memory=0
eval username=\$$i
per_user_memory=$(mem_per_user $username)
total_mem=$(( $total_mem + $per_user_memory))
echo "$username: $per_user_memory KB"
done
echo "Total: $total_mem KB"
Best regards!
You can access the shell commands in python using the subprocess module. It allows you to spawn subprocesses and connect to the out/in/error. You can execute the ps -aux command and parse the output in python.
check out the docs here
Here is my version. I think that Tim's version is not working correctly, the values in KB are too large. I think the RSS column from pmap -x command should be used to give more accurate value. But do note that you can't always get correct values because processes can share memmory. Read this A way to determine a process's "real" memory usage, i.e. private dirty RSS?
#!/bin/bash
if [ "$(id -u)" != "0" ]; then
echo "WARNING: you have to run as root if you want to see all users"
fi
echo "Printing only users that current memmory usage > 0 Kilobytes "
all=0
for username in `ps aux | awk '{ print $1 }' | tail -n +2 | sort | uniq`
do
pids=`ps aux | grep $username | awk -F" " '{print $2}'`
total_memory=0
for pid in $pids
do
process_mem=`pmap -x $pid | tail -1 | awk -F" " '{print $4}'`
if [ ! -z $process_mem ]
then #don't try to add if string has no length
total_memory=$((total_memory+$process_mem))
fi
done
#print only those that use any memmory
if [ $total_memory -gt 0 ]
then
total_memory=$((total_memory/(1024)))
echo "$username : $total_memory MB"
all=$((all+$total_memory))
fi
done
echo "----------------------------------------"
echo "Total: $all MB"
echo "WARNING: Use at your own risk"