centos7 选定默认启动内核,及删除无用内核

#使用cat /boot/grub2/grub.cfg |grep menuentry 查看系统可用内核
[root@bigapp-slave27 ~]# cat /boot/grub2/grub.cfg |grep menuentry
if [ x”${feature_menuentry_id}” = xy ]; then
menuentry_id_option=”–id”
menuentry_id_option=””
export menuentry_id_option
menuentry ‘CentOS Linux (3.10.0-514.16.1.el7.x86_64) 7 (Core)’ –class centos –class gnu-linux –class gnu –class os –unrestricted $menuentry_id_option ‘gnulinux-3.10.0-327.el7.x86_64-advanced-6f5840d0-55ac-4d3b-899b-61c0297c5347’ { (更多…)

Linux下端口映射工具rinetd

Linux下简单好用的工具rinetd,实现端口映射/转发/重定向

软件下载
wget https://github.com/samhocevar/rinetd/releases/download/v0.73/rinetd-0.73.tar.gz

解压安装
tar -xvzf rinetd-0.73.tar.gz
cd rinetd-0.73
yum install -y gcc gcc-c++ autoconf automake build-essential 安装依赖
./bootstrap
./configure
make && make install
rinetd –version 查看安装结果
(更多…)