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Grep - Searching for multiple items using one command

 
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# 1  
Old 02-26-2013
Grep - Searching for multiple items using one command
I am performing a regular check on UNIX servers which involves logging onto UNIX servers and using the grep command to check if a GID exists in the /etc/group directory

e.g. grep 12345 /etc/group

I have five to check on each server, is there anyway I can incorporate them into one command and get an output if the group exists.

e.g. The GIDs are 12345 54321 56789 98765 12986
# 2  
Old 02-26-2013
Quote:
Originally Posted by @MeDaveT
I am performing a regular check on UNIX servers which involves logging onto UNIX servers and using the grep command to check if a GID exists in the /etc/group directory

e.g. grep 12345 /etc/group

I have five to check on each server, is there anyway I can incorporate them into one command and get an output if the group exists.

e.g. The GIDs are 12345 54321 56789 98765 12986
Try:
Code:
grep -E '12345|54321|56789|98765|12986' /etc/group

# 3  
Old 02-27-2013
More precise is
Code:
egrep ':(12345|54321|56789|98765|12986):' /etc/group

Most precise is
Code:
awk -F: '$3~/^(12345|54321|56789|98765|12986)$/' /etc/group

Last but not least let me advertise getent:
Code:
getent group 12345 54321 56789 98765 12986

 
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