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Top Forums Shell Programming and Scripting Help with Shell script that monitors CPU Usage Post 303028222 by mhannor on Wednesday 2nd of January 2019 09:07:41 AM
Old 01-02-2019
Help with Shell script that monitors CPU Usage

I'm a newbie to shell scripting, I was given this script to modify. This script that monitors when CPU Usage is too high based off the top command. The comparison is not working as it should. Its comparing a decimal to a regualar interger. When it send me an email, it send an email and ignores the if statement. I receive an email if its below or above 90. I only need an email if its greater than 90. I use
Code:
 while :; do :; done

to run CPU up to 100%. and then test running the below script. Can you all please assist me in what I'm doing incorrectly here:

Code:
#!/bin/ksh
top -b -n 1 |head -8 >/tmp/cpu.text
sed -e '1,5d' /tmp/cpu.text >/tmp/cpu2.text
High_CPU=`cat /tmp/cpu2.text|tail -1|awk '{print $9}'`
host=`hostname`
if [ "$High_CPU -gt  90" ];
then
mail -s "High CPU USAGE on $host" test@test.comv < /tmp/cpu2.lst
fi
exit;

 

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PIUS(1) 						      General Commands Manual							   PIUS(1)

NAME
pius - PGP Individual UID Signer SYNOPSIS
pius [options] -s <signer-keyid> <keyid> [<keyid> ...] pius [options] -A -r <keyring-path> -s <signer-keyid> DESCRIPTION
pius The PGP Individual UID Signer (PIUS) is a tool for individually signing all of the UIDs on a set of keys and encrypt-emailing each one to it's respective email address. This drastically reduces the time and errors involved in signing keys after a keysigning party. OPTIONS
--version show program's version number and exit -h or --help show this help message and exit -a or --use-agent Use pgp-agent instead of letting gpg prompt the user or every UID. [default: false] -A or --all-keys Sign all keys on the keyring. Requires -r. -b PATH or --gpg-path=PATH Path to gpg binary. [default: /usr/bin/gpg] -e or --encrypt-outfiles Encrypt output files with respective keys. -d or --debug Enable debugging output. -H HOSTNAME or --mail-host Hostname of SMTP server. [default: localhost] -i or --interactive Use the pexpect module for signing and drop to the gpg shell for entering the passphrase. [default: false] -I or --import Also import the unsigned keys from the keyring into the default keyring. Ignored if -r is not specified, or if it's the same as the default keyring. -m EMAIL or --mail Email the encrypted, signed keys to the respective email addresses. EMAIL is the address to send from. See also -H and -p. -M FILE or --mail-text Use the text in FILE as the body of email when sending out emails instead of the default text. To see the default text use --print- default-email. Requires -m. -n EMAIL or --override-email Rather than send to the user, send to this address. Mostly useful for debugging. -o OUTDIR or --out-dir Directory to put signed keys in. [default: /tmp/pius_out] -O or --no-pgp-mime Do not use PGP/Mime when sending email. -p or --cache-passphrase Cache private key passphrase in memory and provide it to gpg instead of letting gpg prompt the user for every UID. [default: true] -P PORT or --mail-port Port of SMTP server. [default: 25] -r KEYRING or --keyring The keyring to use. Be sure to specify full or relative path. Just a filename will cause GPG to assume relative to ~/.gnupg. [default: ~/.gnupg/pubring.gpg] -s SIGNER or --signer The keyid to sign with (required). -S or --mail-tls Use STARTTLS when talking to the SMTP server. -t TMP_DIR or --tmp-dir Directory to put temporary stuff in. [default: /tmp/pius_tmp] -T or --print-default-email Print the default email. -u USER or --mail-user Authenticate to the SMTP server, and use username USER. You will be prompted for the password. Implies -S. -v or --verbose Be more verbose. AUTHOR
PIUS was written by Phil Dibowitz <phil@ipom.com> This manual page was written by Luke Cycon <lcycon@gmail.com>, for the Debian project (but may be used by others). MARCH 2010 PIUS(1)
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