**General Syntax**
srvctl <command> <object> [-flags] [options]
**Command:** The action to be performed, such as start, stop, add, remove, etc.
**Object:** The target component (e.g., database, instance, listener, service).
**Flags/Options:** Additional parameters to specify details like names, paths, or instances.
**Commonly Used Objects:**
* **Database:** Manage Oracle databases in a cluster.
* **Instance:** Manage individual database instances.
* **Service:** Manage database services.
* **Listener:** Manage Oracle listeners.
* **ASM:** Manage Automatic Storage Management (ASM) instances.
* **Nodeapps:** Manage node applications like VIPs and GSD.
**Common Commands:**
1. **add:** Add an object.
2. **remove:** Remove an object.
3. **modify:** Modify an existing object.
4. **start:** Start an object.
5. **stop:** Stop an object.
6. **status:** Check the status of an object.
7. **enable/disable:** Enable or disable an object.
**Srvctl Commands with Examples:**
**Database Management:**
1. **Start a database:**
srvctl start database -d mydb
**-d:** Specifies the database name.
2. **Stop a database:**
srvctl stop database -d mydb
3. **Check the status of a database:**
srvctl status database -d mydb
**Output example:**
Instance mydb1 is running on node1
Instance mydb2 is running on node2
4. **Add a database:**
srvctl add database -d mydb -o /u01/app/oracle/product/19.0.0/dbhome_1
**-o:** Specifies the Oracle home directory.
5. **Remove a database:**
srvctl remove database -d mydb
**Service Management:**
1. **Add a service:**
```bash
srvctl add service -d mydb -s myservice -r mydb1,mydb2
```
- **-s:** Service name
- **-r:** Preferred instances for the service
2. **Start a service:**
```bash
srvctl start service -d mydb -s myservice
```
3. **Stop a service:**
```bash
srvctl stop service -d mydb -s myservice
```
4. **Check the status of a service:**
```bash
srvctl status service -d mydb -s myservice
```
**Listener Management:**
1. **Start a listener:**
```bash
srvctl start listener -n node1
```
- **-n:** Specifies the node name
2. **Stop a listener:**
```bash
srvctl stop listener -n node1
```
3. **Check the status of a listener:**
```bash
srvctl status listener -n node1
```
**ASM Management:**
1. **Start the ASM instance:**
```bash
srvctl start asm -n node1
```
2. **Stop the ASM instance:**
```bash
srvctl stop asm -n node1
```
3. **Check the status of ASM:**
```bash
srvctl status asm -n node1
```
**Node Applications Management:**
1. **Start VIP (Virtual IP):**
```bash
srvctl start vip -n node1
```
2. **Stop VIP:**
```bash
srvctl stop vip -n node1
```
3. **Check the status of node applications:**
```bash
srvctl status nodeapps -n node1
```
**Useful Tips:**
1. **Logging:** Use -v for verbose output to troubleshoot issues.
```bash
srvctl start database -d mydb -v
```
2. **List all databases in a cluster:**
```bash
srvctl config database
```
3. **Check Clusterware version:**
```bash
srvctl -version
```
4. **Debugging:** Use -debug for detailed debug logs.
```bash
srvctl start database -d mydb -debug
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