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Full Discussion: Help to prepare script for monitor services
Top Forums UNIX for Beginners Questions & Answers Help to prepare script for monitor services Post 303045419 by yash_message on Friday 20th of March 2020 08:47:10 AM
Old 03-20-2020
Help to prepare script for monitor services
I need to monitor services in rhel 8
below are the service......
crond
chronyd
rsyslogd
sshd
sssd
firewalld

Scripts..........
Code:
#!/bin/bash
for i in "${SERVICES[@]}"
do
###CHECK SERVICE####
`pgrep $i `
STATS=(echo $?)

if [  $STATS == 0  ]
then
echo   "$i is running"
else
echo   "$i is not running"
fi
done

but after run script, output does not come. please help, where is the problem in scripts.

--- Post updated at 07:17 PM ---

I prepared another script. but getting error.

Code:
#!/bin/bash
for i in `cat SERVICES`
do
###CHECK SERVICE####
status=systemctl | grep running |grep $i |awk '{print $4}'
if [ $status -eq running ]
then
     echo "$i is running"
else
     echo "$i is not running"
fi
done

Output-

[root@localhost ~]# sh service1.sh
service1.sh: line 6: [: -eq: unary operator expected
crond is not running
service1.sh: line 6: [: -eq: unary operator expected
chronyd is not running
service1.sh: line 6: [: -eq: unary operator expected
rsyslogd is not running
service1.sh: line 6: [: -eq: unary operator expected
sshd is not running
service1.sh: line 6: [: -eq: unary operator expected
sssd is not running
service1.sh: line 6: [: -eq: unary operator expected
firewalld is not running


Why it is coming error.
 

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LEARN ABOUT REDHAT

drop_operator

DROP 
OPERATOR(7)						   SQL Commands 						  DROP OPERATOR(7)

NAME

       DROP OPERATOR - remove a user-defined operator

SYNOPSIS

       DROP OPERATOR id ( lefttype | NONE , righttype | NONE ) [ CASCADE | RESTRICT ]

   INPUTS
       id     The identifier (optionally schema-qualified) of an existing operator.

       lefttype
	      The type of the operator's left argument; write NONE if the operator has no left argument.

       righttype
	      The type of the operator's right argument; write NONE if the operator has no right argument.

       CASCADE
	      Automatically drop objects that depend on the operator.

       RESTRICT
	      Refuse to drop the operator if there are any dependent objects.  This is the default.

   OUTPUTS
       DROP OPERATOR
	      The message returned if the command is successful.

       ERROR: RemoveOperator: binary operator 'oper' taking 'lefttype' and 'righttype' does not exist
	      This message occurs if the specified binary operator does not exist.

       ERROR: RemoveOperator: left unary operator 'oper' taking 'lefttype' does not exist
	      This message occurs if the left unary operator specified does not exist.

       ERROR: RemoveOperator: right unary operator 'oper' taking 'righttype' does not exist
	      This message occurs if the right unary operator specified does not exist.

DESCRIPTION

       DROP OPERATOR drops an existing operator from the database.  To execute this command you must be the owner of the operator.

       The left or right type of a left or right unary operator, respectively, must be specified as NONE.

   NOTES
       The DROP OPERATOR statement is a PostgreSQL language extension.

       Refer to CREATE OPERATOR [create_operator(7)] for information on how to create operators.

USAGE

       Remove power operator a^n for int4:

       DROP OPERATOR ^ (int4, int4);

       Remove left unary negation operator (! b) for boolean:

       DROP OPERATOR ! (none, bool);

       Remove right unary factorial operator (i !) for int4:

       DROP OPERATOR ! (int4, none);

COMPATIBILITY

   SQL92
       There is no DROP OPERATOR in SQL92.

SQL - Language Statements					    2002-11-22							  DROP OPERATOR(7)
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