Using SSH to grep keywords from multiple servers Using SSH to grep keywords from multiple servers shell shell

Using SSH to grep keywords from multiple servers


linux bash shell redhat

Here is an example:

KEYWORD=fooSERVERLIST=Linux.prod.datOUTPUTLIST=output.datfor host in $(cat ${SERVERLIST}); do    if [[ -n "$(ssh ${host} grep '${KEYWORD}' /etc/hosts && echo Y)" ]]; then        echo ${host} >> ${OUTPUTLIST}    fidone

linux bash shell redhat

Try GNU parallel

parallel --tag ssh {} grep -l "KEYWORD" /etc/hosts :::: Linux.prod.dat

parallel run command multiple times substituting{}with lines from Linux.prod.dat file.--tag switch adds value from the Linux.prod.dat on the beginning of the file. So, the output of the command will look like:

server1 /etc/hostsserver5 /etc/hostsserver7 /etc/hosts

Where server1, server5, etc. will be names of the servers where /etc/hosts contains KEYWORD

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