CODEWITHSUNDEEP
linuxshellcommand-lineprocessps
Nick Brunt
Nick Brunt

Reputation: 10057

Is there a set of arguments for ps which show Java processes more clearly?

When running the ps command I get an output like this:

[nick]$ ps
  PID TTY          TIME CMD
 3287 pts/3    00:00:00 bash
12308 pts/3    00:00:00 ps
19544 pts/3    00:00:00 STS
19548 pts/3    00:45:25 java
19753 pts/3    00:04:10 java
21149 pts/3    00:15:25 java

This doesn't help me that much because I don't know what each Java process really is. Running ps T gives more information, but now there's too much!

[nick]$ ps T
  PID TTY      STAT   TIME COMMAND
 3287 pts/3    Ss     0:00 bash
12319 pts/3    R+     0:00 ps T
19544 pts/3    S      0:00 /home/nick/springsource/sts-3.0.0.RELEASE/STS
19548 pts/3    Sl    45:25 /usr/lib/jvm/java-6-openjdk-amd64/bin/java -Dosgi.requiredJavaVersion=1.5 -Xms256m -Xmx1536m -XX:MaxPermSize=512m -jar /home/nick/springsource/sts-3.0.0.RELEASE//plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar -os linux -w......
19753 pts/3    Sl     4:10 /usr/lib/jvm/java-6-openjdk-amd64/bin/java -agentlib:jdwp=transport=dt_socket,suspend=y,address=localhost:48135 -Dcatalina.base=/home/nick/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp3 -Dcatalina.home=/home/nic......
21149 pts/3    Sl    15:25 /usr/lib/jvm/java-6-openjdk-amd64/bin/java -agentlib:jdwp=transport=dt_socket,suspend=y,address=localhost:57346 -Dcatalina.base=/home/nick/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp5 -Dcatalina.home=/home/nic......

Is there a way of just displaying the filename of the Java package or class being run? Something like this:

[nick]$ ps
  PID TTY          TIME CMD
 3287 pts/3    00:00:00 bash
12308 pts/3    00:00:00 ps
19544 pts/3    00:00:00 STS
19548 pts/3    00:45:25 java abc.jar
19753 pts/3    00:04:10 java def.java
21149 pts/3    00:15:25 java ghi.jar

If this can't be done with ps arguments, is there a way of achieving it with grep?

Upvotes: 1

Views: 2964

Answers (2)

Jens
Jens

Reputation: 72639

No, not with ps. It's either all args or none (modulo truncation of the arglist). But what about filtering the long ps output to leave just what you want? There's a lot you can do with sed, awk, perl, cut and others. The manuals have all the details.

Example: To print fields 1 through 4 and the last field, use

ps T | awk '{print $1, $2, $3, $4, $NF}'

Note how this matches the Unix philosophy of having one tool do one thing well: ps prints process information, while awk picks the fields you want.

Upvotes: 4

Jiri Kremser
Jiri Kremser

Reputation: 12837

What you are looking for is probably jps cli utility or graphical jconsole.

Upvotes: 1

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