Q：elasticsearch 设置开机自启

以下都是linux命令

sudo systemctl daemon-reload

sudo systemctl stop elasticsearch # 先杀掉卡住的进程
sudo pkill -f elasticsearch # 确保干净
sudo systemctl start elasticsearch
sudo systemctl enable elasticsearch

sudo tee /etc/systemd/system/elasticsearch.service <<'EOF'
[Unit]
Description=Elasticsearch
After=network.target

[Service]
Type=simple
User=elasticsearch
Group=elasticsearch
ExecStart=/u01/middleware/elasticsearch-7.17.29/bin/elasticsearch -p /u01/middleware/elasticsearch-7.17.29/elasticsearch.pid
Restart=on-failure
RestartSec=10
LimitMEMLOCK=infinity
TimeoutSec=300
WorkingDirectory=/u01/middleware/elasticsearch-7.17.29

[Install]
WantedBy=multi-user.target
EOF