Get first and last line of file


bash way
(head -1; tail -1) < /etc/passwd

sed way
sed -n '1p; $p' /etc/passwd

awk way
awk 'NR==1; END { print }' /etc/passwd
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SNMP Oracle Linux

  sudo yum install net-snmp net-snmp-utils -y    nano /etc/snmp/snmpd.conf  agentAddress  udp:10.20.1.2:161 rocommunity public systemctl res...

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