vim /usr/lib/systemd/system/elasticsearch.service

[Unit]

Description=elasticsearch

After=network.target

[Service]

Type=simple

User=user

Group=user

LimitMEMLOCK=infinity

LimitNOFILE=100000

LimitNPROC=100000

Restart=no

ExecStart=/data/application/elasticsearch7.7.0/bin/elasticsearch

PrivateTmp=true

[Install]

WantedBy=multi-user.target