java证书安装和更新/删除

拿到证书，如 ****2019.cer。
在WIN下面，双击查看有效期是不是已经过期。
上传到服务器，如/app/****2019.cer


[root@****-test001-10 bin]# cd /usr/java/jdk1.6.0_32/jre/lib/security
导入证书
[root@****-test001-10 security]# keytool -import -alias ****2019 -keystore cacerts -file /app/****2019.cer
Enter keystore password:  
Extensions:

#1: ObjectId: 2.5.29.15 Criticality=true
KeyUsage [
  DigitalSignature
  Key_Encipherment
]

#2: ObjectId: 2.5.29.19 Criticality=true
BasicConstraints:[
  CA:false
  PathLen: undefined
]

AuthorityInfoAccess [
  [
   acc
]
                                  .,..
]

]

ExtendedKeyUsages [
  serverAuth
  clientAuth
]

Trust this certificate? [no]:  y
Certificate was added to keystore
[root@****-test001-10 security]#
查看证书
[root@****-test001-10 security]# keytool -list -alias ****2019 -keystore cacerts
Enter keystore password:  
****2019, Jan 19, 2022, trustedCertEntry,
Certificate fingerprint

[root@****-test001-10 security]# pwd
/usr/java/jdk1.6.0_32/jre/lib/security
[root@****-test001-10 security]#
删除证书

[root@****-test001-10 ~]# keytool -delete -alias icts2019 -keystore cacerts