用 sudo 运行几个命令

 placeholderCopysudo -s <<EOF
  a='var'
  echo 'Running serveral commands with sudo'
  mktemp -d
  echo "\$a"
EOF

• 需要转义 $a 以防止它被当前 shell 扩展

要么

 placeholderCopysudo -s <<'EOF'
  a='var'
  echo 'Running serveral commands with sudo'
  mktemp -d
  echo "$a"
EOF