/proc/sysrq-trigger文件的强大功能

/proc/sysrq-trigger文件的强大功能

/proc/sysrq-trigger该文件能做些什么事情呢？  

# 立即重新启动计算机    （Reboots the kernel without first unmounting file systems or syncing disks attached to the system）echo "b" > /proc/sysrq-trigger    

# 立即关闭计算机（shuts off the system）echo "o" > /proc/sysrq-trigger

# 导出内存分配的信息 （可以用/var/log/message 查看）（Outputs memory statistics to the console）   echo "m" > /proc/sysrq-trigger    

# 导出当前CPU寄存器信息和标志位的信息（Outputs all flags and registers to the console）echo "p" > /proc/sysrq-trigger    

# 导出线程状态信息    （Outputs a list of processes to the console）echo "t" > /proc/sysrq-trigger

# 故意让系统崩溃    （ Crashes the system without first unmounting file systems or syncing disks attached to the system）echo "c" > /proc/sysrq-trigger

# 立即重新挂载所有的文件系统 （Attempts to sync disks attached to the system）echo "s" > /proc/sysrq-trigger    

# 立即重新挂载所有的文件系统为只读 （Attempts to unmount and remount all file systems as read-only）echo "u" > /proc/sysrq-trigger

呵呵，此外还有两个，类似于强制注销的功能

e

— Kills all processes except

init

using SIGTERM

i

— Kills all processes except

init

using SIGKILL