zuyu

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt update
sudo apt upgrade libstdc++6 -y
sudo apt dist-upgrade
strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX

zuyu

#!/bin/bash
typeset -i core_id
typeset -i sibling_id
typeset -i state

for i in /sys/devices/system/cpu/cpu[0-9]*; do
  core_id="${i##*cpu}"
  sibling_id="-1"

  if [ -f ${i}/topology/thread_siblings_list ]; then

zuyu

#!/bin/bash
typeset -i state

for i in /sys/devices/system/cpu/cpu[0-9]*; do
  if [ -d ${i}/node1 ]; then
    state="$(<${i}/online)"
    echo -n "$((1-state))" > "${i}/online"
    echo "switched ${i}/online to $((1-state))"
  fi
done

zuyu

sudo apt update && \
sudo apt install build-essential software-properties-common -y && \
sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && \
sudo apt update && \
sudo apt install gcc-6 g++-6 -y && \
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-6 && \
gcc -v