fix: solve the problem that the private key not works when connecting because permission of private key is too open
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		@@ -122,8 +122,10 @@ export default class User {
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        const privateKeyStr = privateKey;
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					        const privateKeyStr = privateKey;
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        try {
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					        try {
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          fs.writeFileSync(this.getUserPublicKeyPath(), publicKeyStr);
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					          await fs.writeFileSync(this.getUserPublicKeyPath(), publicKeyStr);
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          fs.writeFileSync(this.getUserPrivateKeyPath(), privateKeyStr);
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					          await fs.writeFileSync(this.getUserPrivateKeyPath(), privateKeyStr);
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					          // limit the permission of private key to prevent that the private key not works
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					          await fs.chmodSync(this.getUserPrivateKeyPath(), 0o600)
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        } catch(error) {
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					        } catch(error) {
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          console.error("Failed to write public/private key into the default ssh public/key file: ", error);
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					          console.error("Failed to write public/private key into the default ssh public/key file: ", error);
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        }
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					        }
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