快速重复执行上次执行的相同命令
# ps -ef |grep java
root 4297 1 0 Jul10 ? 00:07:19 /opt/java/jdk1.8.0_60/bin/java -Dproc_historyserver -Xmx1000m -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/opt/hadoop-2.7.7 -Dhadoop.id.str=root -Dhadoop.root.logger=INFO,console -Djava.library.path=/opt/hadoop-2.7.7/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=hadoop.log -Dhadoop.root.logger=INFO,console -Dhadoop.id.str=root -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/opt/hadoop-2.7.7 -Dhadoop.id.str=root -Dhadoop.root.logger=INFO,console -Djava.library.path=/opt/hadoop-2.7.7/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=mapred-root-historyserver-cdm1.log -Dhadoop.root.logger=INFO,RFA -Dmapred.jobsummary.logger=INFO,JSA -Dhadoop.security.logger=INFO,NullAppender org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer
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# !ps
root 4297 1 0 Jul10 ? 00:07:19 /opt/java/jdk1.8.0_60/bin/java -Dproc_historyserver -Xmx1000m -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/opt/hadoop-2.7.7 -Dhadoop.id.str=root -Dhadoop.root.logger=INFO,console -Djava.library.path=/opt/hadoop-2.7.7/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=hadoop.log -Dhadoop.root.logger=INFO,console -Dhadoop.id.str=root -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/opt/hadoop-2.7.7 -Dhadoop.id.str=root -Dhadoop.root.logger=INFO,console -Djava.library.path=/opt/hadoop-2.7.7/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/opt/hadoop-2.7.7/logs -Dhadoop.log.file=mapred-root-historyserver-cdm1.log -Dhadoop.root.logger=INFO,RFA -Dmapred.jobsummary.logger=INFO,JSA -Dhadoop.security.logger=INFO,NullAppender org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer
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