Assign the output of a command to a variable [repeat] - assigning the output of a command to a variable [duplicate]

problem ：

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Closed 1 year ago .1 Years ago close .

I am new with unix and I am writing a shell script. I am a unix Novice , Writing a shell Script .

When I run this line on the command prompt, it prints the total count of the number of processes which matches: When I run this line at the command prompt , It will print the total number of matching processes ：

ps -ef | awk '/siebsvc –s siebsrvr/ && !/awk/ { a++ } END { print a }'

example, the output of the above line is 2 in the command prompt. for example , The output of the above line at the command prompt is 2.

I want to write a shell script in which the output of the above line (2) is assigned to a variable, which will be later be used for comparison in an if statement. I want to write one shell Script , Among them, paragraph (2) The output of the row is assigned to a variable , This variable will be used later in if Statement .

I am looking for something like I'm looking for something similar

output= `ps -ef | awk '/siebsvc –s siebsrvr/ && !/awk/ { a++ } END { print a }'`echo $output

But when i run it, it says output could not be found whereas I am expecting 2. Please help. But when I run it , It says the output cannot be found , And I expect 2. Please help .

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Solution ：

Reference resources ： https://stackoom.com/en/question/1Oo2K