1 Ubuntu下安装perf
在Ubuntu18上默认没有安装perf，可以通过如下命令尝试：sudo apt-get install linux-tools
结果出来以下内容：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package linux-tools is a virtual package provided by:
linux-tools-oem-osp1 5.0.0.1025.28
linux-tools-gke-5.05.0.0.1023.12
linux-tools-virtual-hwe-18.04-edge 5.3.0.12.83
linux-tools-virtual-hwe-18.045.0.0.32.89
linux-tools-virtual4.15.0.66.68
linux-tools-oracle 4.15.0.1027.30
linux-tools-oem 4.15.0.1059.63
linux-tools-lowlatency-hwe-18.04-edge 5.3.0.12.83
linux-tools-lowlatency-hwe-18.045.0.0.32.89
linux-tools-lowlatency 4.15.0.66.68
linux-tools-gke-4.154.15.0.1046.49
linux-tools-generic-hwe-18.04-edge 5.3.0.12.83
linux-tools-generic-hwe-18.045.0.0.32.89
linux-tools-generic 4.15.0.66.68
linux-tools-gcp 5.0.0.1021.26
linux-tools-aws 4.15.0.1052.51
You should explicitly select one to install.
E: Package ‘linux-tools‘ has no installation candidate
一般选择安装 linux-tools-generic 就好了，使用如下命令：
sudo apt-get install linux-tools-common sudo apt-get install linux-tools
可能提示错误，这个时候按照提示升级安装即可：
WARNING: perf not found for kernel 4.15.0-48 You may need to install the following packages forthis specific kernel: linux-tools-4.15.0-48-generic linux-cloud-tools-4.15.0-48-generic You may also want to install one of the following packages to keep up to date: linux-tools-generic linux-cloud-tools-generic
原文：https://www.cnblogs.com/kuliuheng/p/11698459.html
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