Java: Difference between revisions
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openssl x509 -in BPClass3RootCA.cer -inform der -noout -text | openssl x509 -in BPClass3RootCA.cer -inform der -noout -text | ||
=show jar file signing | =show jar file signing= | ||
jarsigner -verify -verbose -certs file.jar | jarsigner -verify -verbose -certs file.jar | ||
=modify settiings= | =modify settiings= | ||
jcontrol | jcontrol | ||
=connect via jmx | =connect via jmx= | ||
jcontrol | jcontrol | ||
=java options= | =java options= | ||
| Line 22: | Line 22: | ||
Specifies the maximum memory size | Specifies the maximum memory size | ||
-Xmx2048m / -mx20148m | -Xmx2048m / -mx20148m | ||
=install java= | |||
#!/bin/bash | #!/bin/bash | ||
JDK_VERSION=8u71 | JDK_VERSION=8u71 | ||
| Line 30: | Line 30: | ||
rpm -i jdk-$JDK_VERSION-linux-x64.rpm | rpm -i jdk-$JDK_VERSION-linux-x64.rpm | ||
rm -f jdk-$JDK_VERSION-linux-x64.rpm | rm -f jdk-$JDK_VERSION-linux-x64.rpm | ||
=heap utilization= | |||
jstat -gc ${PID} | jstat -gc ${PID} | ||
Revision as of 20:55, 6 April 2016
Java information
To list keys in java keystore.
/usr/java/jre1.6.0_03/bin/keytool --list --keystore /usr/java/jre1.6.0_03/lib/security/cacerts
Import key in java keystore.
openssl x509 -outform der -in certificate.pem -out certificate.der keytool -import -alias your-alias -keystore cacerts -file certificate.der
List content of der.
openssl x509 -in BPClass3RootCA.cer -inform der -noout -text
show jar file signing
jarsigner -verify -verbose -certs file.jar
modify settiings
jcontrol
connect via jmx
jcontrol
java options
Sets the initial memory size
-Xms256m / -ms256m
Specifies the maximum memory size
-Xmx2048m / -mx20148m
install java
#!/bin/bash JDK_VERSION=8u71 JDK_BUILD_VERSION=b15 cd /tmp curl -LO "http://download.oracle.com/otn-pub/java/jdk/$JDK_VERSION-$JDK_BUILD_VERSION/jdk-$JDK_VERSION-linux-x64.rpm" -H 'Cookie: oraclelicense=accept-securebackup-cookie' rpm -i jdk-$JDK_VERSION-linux-x64.rpm rm -f jdk-$JDK_VERSION-linux-x64.rpm
heap utilization
jstat -gc ${PID}