Most space-consuming directories df -h .; du -sh -- * | sort -hr Find files newer than.. find . -type f -newermt 2018-01-01 Sum up size from files from find: find . -type f -newermt 2018-01-01 -printf "%s\n" -print0 | xargs -0 du -hc | tail -n1 Clean up files in directory and compress some 0 1 * * * find /some/path/to/dir -type f -mtime +30 -exec rm {} \; > /dev/null 2>&1 0 1 * * * find /some/path/to/dir -type f -mtime +8 -exec gzip {} \; > /dev/null 2>&1 Java expose jmx remote when not run with parameters jcmd PID_HERE ManagementAgent.start jmxremote.port=SOME_PORT_HERE jmxremote.authenticate=false jmxremote.ssl=false Java run profiler for many processes jps | grep PROCESS_NAME | cut -d ' ' -f1 | sed -re 's/(.+)/jcmd \1 JFR.start duration=600s filename=~\/tmp\/server-\1.jfr/' | bash Java run heapdumps for many processes jps | grep PROCESS_NAME | cut -d ' ' -f1 | sed -re 's/(.+)/jmap -dump:format=b,file=server-heapdump-\1.hprof \1/' | bash
