在 CentOS 7 Linux 內安裝 Cardano KEVM Testnet Wallet

1、Cardano KEVM Testnet 相關參考資料：

（1）Cardano KEVM Testnet 官網：
https://testnet.iohkdev.io/

（2）Faucet
http://testnet.iohkdev.io/goguen/faucet/

（3）Mantis 下載
https://github.com/input-output-hk/mantis/releases

（4）Block Explorer
http://testnet.iohkdev.io/goguen/explorer/

（5）How to get on the Cardano KEVM Testnet
https://medium.com/emurgohk/how-to-get-on-the-cardano-kevm-testnet-835009fa2c8d

（6）Testnet - KEVM - some difficulties seeing transactions and contract output
https://forum.cardano.org/t/testnet-kevm-some-difficulties-seeing-transactions-and-contract-output/12762

2、在 Virtual Machine 或實體機安裝 CentOS Linux VM 內安裝 Cardano KEVM Testnets（Mantis）

（1）在 Virtual Machine 內安裝 CentOS Linux 可參考如下資訊：

a、VMware Workstation 虛擬機器軟體安裝
https://github.com/oneleo/PythonSparkMLBookClub/tree/master/Homework-PythonSparkML_08/001-VMwareWorkstation

b、CenOS Linux 作業系統安裝
https://github.com/oneleo/PythonSparkMLBookClub/tree/master/Homework-PythonSparkML_08/002-InstallCentOS

（2）更新 CentOS Linux（桌面版）

$ sudo systemctl stop packagekit
$ sudo systemctl disable packagekit
$ sudo yum -y autoremove && sudo yum clean all
$ sudo rm -rf /var/cache/yum
$ sudo yum check-update && sudo yum -y update

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（3）讓 sudo 的群組成員，在執行 sudo xxx 命令時，不再需要輸入密碼。

$ sudo vim /etc/sudoers

---

  …（前略）
  ## Allows people in group wheel to run all commands
  %wheel ALL=(ALL) ALL
  
  ## Same thing without a password
  # %wheel ALL=(ALL) NOPASSWD: ALL
  …（後略）

---

↑ 第 99 列及 102 列修改成 ↓

  …（前略）
  ## Allows people in group wheel to run all commands
  # %wheel ALL=(ALL) ALL
  
  ## Same thing without a password
  %wheel ALL=(ALL) NOPASSWD: ALL
  …（後略）

---

（4）安裝 CentOS 常用軟體

$ sudo yum install -y openssh wget vim gedit nano net-tools iputils traceroute curl bind-utils sudo man tree

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（5）在 CentOS Linux 內安裝 OpenJDK 8 JRE
參考：https://www.digitalocean.com/community/tutorials/how-to-install-java-on-centos-and-fedora#install-oracle-java-8

$ sudo yum install -y java-1.8.0-openjdk
$ java

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（6）安裝 Cardano KEVM Testnet Wallet

$ wget https://github.com/input-output-hk/mantis/releases/download/iele_testnet_v0.1/mantis_iele-testnet_v0.1.zip
$ sudo unzip ./mantis_iele-testnet_v0.1.zip -d /opt/
$ rm -rf ./mantis_iele-testnet_v0.1.zip
$ sudo chown -R "$USER":"$USER" /opt && sudo chmod -R 775 /opt
$ ln -sf "/opt/mantis-1.0-daedalus-rc1" "/opt/mantis"
$ vim "$HOME/.bashrc"

//-------------------------Content-------------------------
  …（前略）
export MANTISHOME="/opt/mantis"
export PATH="$PATH:$MANTISHOME/bin"

alias mallet='mallet https://kevm-testnet.iohkdev.io:8546/'
alias mantis='Here=$(pwd); cd /opt/mantis && (./bin/mantis-vm &); cd $Here; unset Here;'
//-------------------------Content-------------------------

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（7）重新啟動新的 Bash 使得上述環境變數生效

$ exec /bin/bash

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（8）執行 Testnet Mantis Client（非必要）

$ mantis

//-------------------------Content-------------------------
00:28:04 Slf4jLogger started
00:28:04 VM server listening on 127.0.0.1:8888
//-------------------------Content-------------------------

$ 【Enter】

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註：此時會將 mantis-vm 推到背景執行，若要停止在背景的 mantis-vm 程序請執行下方指令

$ kill $(ps aux | grep 'mantis'  | grep -v '\-\-color\=auto' | awk '{print $2}')

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（9）進入 Testnet Wallet 指令列（Interactive Shell）

註：若要離開 mallet> Shell，請輸入【Ctrl + D】鍵

$ mallet
mallet> 【Ctrl + D】

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DdzFFzCqrhsup2Q4nnhKJJZ5BRuPkYUSPqDJn72t2dtHtVqsz5kQQmopMQR16Sv9qS5NC4w8Kv5P8XrDH2n2FD2akxtrntjc8hbgAmTz