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Full Discussion: Need way to grep the following output in bold
Top Forums Shell Programming and Scripting Need way to grep the following output in bold Post 303014424 by rovf on Monday 12th of March 2018 08:58:41 AM
Old 03-12-2018
Quote:
Originally Posted by jaapar
I was able to get the output of 3 lines but not managed to create a logic when the read go above 600MB.

Code:
[root@xxxx ~]# iotop -bot --iter=1 |grep "Actual DISK READ"| awk {'print $5'}
145.13
[root@xxxx ~]#

So, basically, you want to test, whether a number containing a decimal point is larger than 600?

If you are using Zsh as a shell, you have decimal arithmetic, and can simply compare the number you get numerically to 600. This is probably the most straightforward way.

If you are using a shell, which has only integer arithmetic, you can just remove everything starting from the dot, which in your example would leave you with 145, and if this is numerically greater or equal to 600, you are sending your email.

The third possibility is to move the logic into awk. Currently, you always output $5. You could print this only if $5 is numerically greater than 600. This means that whenever you get a non-empty output, you have to send the email.

Which approach you take, is just a matter of taste.....
This User Gave Thanks to rovf For This Post:
jaapar
 

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LEARN ABOUT LINUX

pam_succeed_if

PAM_SUCCEED_IF(8)						     Linux-PAM							 PAM_SUCCEED_IF(8)

NAME

       pam_succeed_if - test account characteristics

SYNOPSIS

       pam_succeed_if.so [flag...] [condition...]

DESCRIPTION

       pam_succeed_if.so is designed to succeed or fail authentication based on characteristics of the account belonging to the user being
       authenticated. One use is to select whether to load other modules based on this test.

       The module should be given one or more conditions as module arguments, and authentication will succeed only if all of the conditions are
       met.

OPTIONS

       The following flags are supported:

       debug
	   Turns on debugging messages sent to syslog.

       use_uid
	   Evaluate conditions using the account of the user whose UID the application is running under instead of the user being authenticated.

       quiet
	   Don't log failure or success to the system log.

       quiet_fail
	   Don't log failure to the system log.

       quiet_success
	   Don't log success to the system log.

       audit
	   Log unknown users to the system log.

       Conditions are three words: a field, a test, and a value to test for.

       Available fields are user, uid, gid, shell, home and service:

       field < number
	   Field has a value numerically less than number.

       field <= number
	   Field has a value numerically less than or equal to number.

       field eq number
	   Field has a value numerically equal to number.

       field >= number
	   Field has a value numerically greater than or equal to number.

       field > number
	   Field has a value numerically greater than number.

       field ne number
	   Field has a value numerically different from number.

       field = string
	   Field exactly matches the given string.

       field != string
	   Field does not match the given string.

       field =~ glob
	   Field matches the given glob.

       field !~ glob
	   Field does not match the given glob.

       field in item:item:...
	   Field is contained in the list of items separated by colons.

       field notin item:item:...
	   Field is not contained in the list of items separated by colons.

       user ingroup group
	   User is in given group.

       user notingroup group
	   User is not in given group.

       user innetgr netgroup
	   (user,host) is in given netgroup.

       user notinnetgr group
	   (user,host) is not in given netgroup.

MODULE TYPES PROVIDED

       All module types (account, auth, password and session) are provided.

RETURN VALUES

       PAM_SUCCESS
	   The condition was true.

       PAM_AUTH_ERR
	   The condition was false.

       PAM_SERVICE_ERR
	   A service error occurred or the arguments can't be parsed correctly.

EXAMPLES

       To emulate the behaviour of pam_wheel, except there is no fallback to group 0:

	   auth required pam_succeed_if.so quiet user ingroup wheel

       Given that the type matches, only loads the othermodule rule if the UID is over 500. Adjust the number after default to skip several rules.

	   type [default=1 success=ignore] pam_succeed_if.so quiet uid > 500
	   type required othermodule.so arguments...

SEE ALSO

       glob(7), pam(7)

AUTHOR

       Nalin Dahyabhai <nalin@redhat.com>

Linux-PAM							    06/04/2011							 PAM_SUCCEED_IF(8)
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