Filter processes by string pattern (let it be “java” processes):
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ps -eaf | grep java |
Find my process in resulted list and kill by id:
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kill -9 123 |
Kill all processes by “java” pattern:
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kill -9 `ps -eaf | grep java | grep -v grep | awk '{print$2}'` |
Starting Tomcat7 from Eclipse produced an error:
Could not load the Tomcat server configuration at /usr/share/tomcat7/conf. The configuration may be corrupt or incomplete.
Solution:
Tomcat7 split into different folders by default. Eclipse expects Tomcat to be in one folder. To resolve, we create symbolic links in Tomcat home dir.
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cd /usr/share/tomcat7 sudo ln -s /var/lib/tomcat7/conf conf sudo ln -s /var/log/tomcat7 log sudo ln -s /etc/tomcat7/policy.d/03catalina.policy conf/catalina.policy sudo chmod -R a+rwx /usr/share/tomcat7/conf /etc/init.d/tomcat7 stop |
Now Eclipse should be able to start Tomcat.
Simple steps to run Spark 1.5.2 on Ubuntu 14.04 with Yarn (Hadoop 2.7.1)
Install Hadoop (see http://dmitrypukhov.pro/install-hadoop-on-ubuntu/)
Download pre-build Spark from http://spark.apache.org/downloads.html and unpack, say to /opt/spark/ Continue reading
Enrironment: PGAdmin III, Ubuntu 14.x on different machines.
Symptoms: PGAdmin hangs, window grayed. Sometimes it happens occationally when connecting to DB, more often – when opening table properties or SQL queries window.
Solution: remove PGAdmin queries history file
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rm ~/.pgadmin_histoqueries |
Configuration: Ubuntu 14.04, postgresql 9.3, postgis 2
A quick note how to add a key from myKey.pem file to authorized keys on Linux.
The permissions for ~/.ssh/ folder should be 700. Permissions for authorized_keys file and myKey.pem are to be 600. Continue reading
Steps to manually sign a jar
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keytool -genkey -v -keystore ~/dmitry-dev.keystore -alias dmitry-dev -keyalg RSA -keysize 2048 -validity 10000 |
Enter password and passphrase, remember them Continue reading
Tomcat 7 worked fine with Java 1.7 When I updated Java to 1.8 I got Unsupported major.minor version 52.0 error in Tomcat.
Solution: edit /etc/default/tomcat7 and set JAVA_HOME to Java 8 location. My variant is
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JAVA_HOME=/usr/lib/jvm/java-8-oracle |
How to redirect output both to screen and file, separate stderr and stdout etc.
Linux shell has 3 file descriptors:
How to install and configure Ganglia monitoring tool on a cluster.
Prerequisites:
Deployment plan:
