Platform: i686-pc-linux-gnu is not supported

[HenryXin]

Basic Infos

Platform

• Hardware: [ESP-12]
• Core Version: [latest git ]
• Development Env: [Arduino IDE]
• Operating System: [Ubuntu]

Settings in IDE

• Module: [Nodemcu]
• Flash Mode: [dio]
• Flash Size: [4MB]
• lwip Variant: [v2 Lower Memory]
• Reset Method: [nodemcu]
• Flash Frequency: [40Mhz]
• CPU Frequency: [80Mhz]
• Upload Using: [SERIAL]
• Upload Speed: [115200] (serial upload only)

Problem Description

When I uploading the test code to the nodeMCU
Detailed problem description goes here.
Arduino: 1.8.8 (Linux), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled, 4M (no SPIFFS), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

Sketch uses 258844 bytes (24%) of program storage space. Maximum is 1044464 bytes.
Global variables use 26924 bytes (32%) of dynamic memory, leaving 54996 bytes for local variables. Maximum is 81920 bytes.
java.io.IOException: Cannot run program "/home/user1/Downloads/arduino-1.8.8/hardware/esp8266com/esp8266/tools/esptool/esptool": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at java.lang.Runtime.exec(Runtime.java:620)
at java.lang.Runtime.exec(Runtime.java:485)
at processing.app.helpers.ProcessUtils.exec(ProcessUtils.java:11)
at cc.arduino.packages.Uploader.executeUploadCommand(Uploader.java:129)
at cc.arduino.packages.uploaders.SerialUploader.runCommand(SerialUploader.java:383)
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:197)
at cc.arduino.UploaderUtils.upload(UploaderUtils.java:77)
at processing.app.SketchController.upload(SketchController.java:732)
at processing.app.SketchController.exportApplet(SketchController.java:703)
at processing.app.Editor$UploadHandler.run(Editor.java:2042)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.(UNIXProcess.java:247)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 11 more

And checked the "package_esp8266com_index.template.json", there is no "i686-pc-linux-gnu" option.

Thanks,
Henry