rust scoped thread pool

用rayon即可。 mod a { fn fun(a: &mut i32) -> i32 { *a += 1; return *a + 233; } pub fn main() { let mut a = 233; ...
2021-08-09

qemu-bridge-helper: failed to create tun device: Operation not permitted

virsh start deepin error: Failed to start domain deepin error: internal error: /usr/lib/qemu/qemu-bridge-helper --use-vnet --br=br0 --fd=30: failed to ...
2021-08-08

qemu br0 access denied by acl file

echo "allow all" | sudo tee /etc/qemu/${USER}.conf echo "include /etc/qemu/${USER}.conf" | sudo tee --append /etc/qemu/bridge.conf sudo chown root:${U ...
2021-08-08

virsh终端访问虚拟机并联网

¶ 安装 # Debian 12 sudo apt install -y libvirt-daemon libvirt-clients ¶ 配置权限 如果要使用KVM的话，首先要让普通用户使用libvirt时能使用KVM： libvirt让普通用户能用kvm ¶ 配置网桥 Linux配置网桥 ¶ 将 ...
2021-08-08

qemu-system-x86_64: warning: host doesn‘t support requested feature: CPUID.80000001H:ECX.svm [bit 2]

我在virtualbox里的虚拟机里用qemu创建虚拟机时报这个错。解决方法是在命令里加上-cpu host sudo qemu-system-x86_64 -cpu host -m 1024 -enable-kvm centos.img -cdrom ~/Downloads/CentOS-8.2. ...
2021-08-08

git checkout 远程分支error

比如我有一个远程分支origin/test，正常情况下git checkout test的输出应该是 Branch 'test' set up to track remote branch 'test' from 'origin'. Switched to a new branch 'test' 但 ...
2021-08-07

shell交换stdout stderr

比如这个脚本myscript.sh： #!/bin/sh echo "I'm stdout"; echo "I'm stderr" >&2; 交换它的stdout和stderr可以这样做： (sh myscript.sh 3>&2 2>&1 1>&a ...
2021-08-04

rust private super trait

pub(crate) mod private { #[doc(hidden)] pub trait FooPrivate<Arg> { fn foo(&self, arg: Arg); } } pub trait Foo<Arg ...
2021-08-03

Linux C语言目录操作

¶ 系统调用(man 2) 打开或创建文件 #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> int open(const char *pathname, int flags); ...
2021-08-02

使得两次编译linux内核产生一样的结果

export INSTALL_MOD_STRIP=-s export KBUILD_BUILD_TIMESTAMP=0 export KBUILD_BUILD_USER=root export KBUILD_BUILD_HOST=localhost make mrproper make allnoc ...
2021-08-01
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