arthas/tutorials/katacoda/arthas-advanced-en/tips.md

Some tips on using Arthas.

help

Every command in Arthas has help doc. Can be viewed with -h. There are EXAMPLES and WIKI links in the help doc.

such as:

sysprop -h{{execute T2}}

Auto completion

Arthas supports a wide range of auto-completion features, and you can type Tab to get more information when you have doubts about your use.

For example, after typing sysprop java., enter Tab, which will complete the corresponding key:

$ sysprop java.
java.runtime.name             java.protocol.handler.pkgs    java.vm.version
java.vm.vendor                java.vendor.url               java.vm.name
...

Readline shortcut key support

Arthas supports common command line shortcuts, such as Ctrl + A to jump to the beginning of the line, and Ctrl + E to jump to the end of the line.

More shortcuts can be viewed with the keymap{{execute T2}} command.

Completion of history commands

If you want to execute the previous command again, you can match the previous command by pressing Up/↑ or Ddown/↓ when you enter halfway.

For example, if sysprop java.version was executed before, then after entering sysprop ja, you can type Up/↑, and it will be automatically completed as sysprop java.version.

If you want to see all the history commands, you can also view them with the history{{execute T2}} command.

pipeline

Arthas supports some simple commands after the pipeline, such as:

sysprop | grep java{{execute T2}}

sysprop | wc -l{{execute T2}}