基本概念: Linux 内核有个机制叫OOM killer(Out Of Memory killer),该机制会监控那些占用内存过大,尤其是瞬间占用内存很快的进程,然后防止内存耗尽而自动把该进程杀掉.内核检测到系统内存不足.挑选并杀掉某个进程的过程可以参考内核源代码linux/mm/oom_kill.c,当系统内存不足的时候,out_of_memory()被触发,然后调用select_bad_process()选择一个”bad”进程杀掉.如何判断和选择一个”bad进程呢?linux选择”bad”

linux dmesg命令参数及用法详解(linux显示开机信息命令) http://blog.csdn.net/zhongyhc/article/details/8909905 功能说明:显示开机信息. 语 法:dmesg [-cn][-s <缓冲区大小>] 补充说明:kernel会将开机信息存储在ring buffer中.您若是开机时来不及查看信息,可利用dmesg来查看.开机信息亦保存在/var/log目录中,名称为dmesg的文件里. 参 数: -c 显示信息后,清除ring buff

Linux显示全部执行中的进程 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ ps aux | less USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.1 33788 3172 ? Ss 23:00 0:01 /sbin/init root 2 0.0 0.0 0 0 ? S 23:00 0:00 [kthreadd] root 3 0.0 0.0 0 0 ? S

Linux显示系统的诊断信息 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ dmesg [ 1.492480] EDD information not available. [ 1.492521] PM: Hibernation image not present or could not be loaded. [ 1.506437] input: AT Translated Set 2 keyboard as /devices/platform/i80

Linux显示历史记录 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ history 1 uname -a 2 lsusb 3 df -h 4 ps -A 5 apt-gethelp 6 apt - get help 7 make dir /usr/local/java 8 make dir/usr/local/java 9 mkdir /usr/local/java 10 chmod g+x jdk-7u71-linux-x64.bin 11 apt-

Linux显示列出块设备 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 465.8G 0 disk ├─sda1 8:1 0 60G 0 part ├─sda2 8:2 0 1K 0 part ├─sda5 8:5 0 102G 0 part ├─sda6 8:6 0 102G 0 part ├─sda7 8:7 0 101G 0 part ├

Linux显示一行显示列总计 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free -t total used free shared buffers cached Mem: 3103064 1608344 1494720 7872 67432 652132 -/+ buffers/cache: 888780 2214284 Swap: 3998716 0 3998716 Total: 7101780 1608344 5493436 youhaidon

Linux显示内存统计最大和最小的详情 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free -l total used free shared buffers cached Mem: 3103064 1547152 1555912 7412 66264 647296 Low: 3103064 1547152 1555912 High: 0 0 0 -/+ buffers/cache: 833592 2269472 Swap: 3998716 0 39

Linux显示计算次数的结果 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free -c free:选项需要一个参数 -- c Usage: free [options] Options: -b, --bytes show output in bytes -k, --kilo show output in kilobytes -m, --mega show output in megabytes -g, --giga show output in gi

Linux显示所有输出域自动缩小到最短三数字单元和显示单元的打印 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free -h total used free shared buffers cached Mem: 3.0G 1.4G 1.6G 7.1M 62M 621M -/+ buffers/cache: 715M 2.3G Swap: 3.8G 0B 3.8G youhaidong@youhaidong-ThinkPad-Edge-E545:~$ f

Linux显示所有运行中的进程 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ ps aux | less USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.1 33788 3172 ? Ss 23:00 0:01 /sbin/init root 2 0.0 0.0 0 0 ? S 23:00 0:00 [kthreadd] root 3 0.0 0.0 0 0 ? S

Linux显示登录Shell信息 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ finger -p Login Name Tty Idle Login Time Office Office Phone youhaidong youhaidong *:0 Mar 8 22:10 (:0) youhaidong youhaidong pts/0 Mar 8 22:15 (:0) youhaidong@youhaidong-ThinkPad-Edge-E545

Linux显示邮件状态等信息 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ finger -l Login: youhaidong Name: youhaidong Directory: /home/youhaidong Shell: /bin/bash On since Sun Mar 8 22:10 (CST) on :0 from :0 (messages off) On since Sun Mar 8 22:15 (CST) on pts/0 f

Linux显示用户注册名 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ finger -s Login Name Tty Idle Login Time Office Office Phone youhaidong youhaidong *:0 Mar 8 22:10 (:0) youhaidong youhaidong pts/0 Mar 8 22:15 (:0) youhaidong@youhaidong-ThinkPad-Edge-E545:~$

Linux显示指定区块大小为1048576字节 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ df -m 文件系统 1M-blocks 已用 可用 已用% 挂载点 /dev/sda8 19097 7283 10822 41% / none 1 0 1 0% /sys/fs/cgroup udev 1505 1 1505 1% /dev tmpfs 304 2 302 1% /run none 5 0 5 0% /run/lock none 1516 1

Linux显示本地端的文件系统 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ df -l 文件系统 1K-blocks 已用 可用 已用% 挂载点 /dev/sda8 19554840 7456948 11081508 41% / none 4 0 4 0% /sys/fs/cgroup udev 1540740 4 1540736 1% /dev tmpfs 310308 1472 308836 1% /run none 5120 0 5120 0%

Linux显示指定区块大小为1024字节 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ df -k 文件系统 1K-blocks 已用 可用 已用% 挂载点 /dev/sda8 19554840 7431164 11107292 41% / none 4 0 4 0% /sys/fs/cgroup udev 1540740 4 1540736 1% /dev tmpfs 310308 1472 308836 1% /run none 5120 0 512

Linux显示inode的信息 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ df -i 文件系统 Inode 已用(I) 可用(I) 已用(I)% 挂载点 /dev/sda8 1250928 238775 1012153 20% / none 387883 2 387881 1% /sys/fs/cgroup udev 385185 575 384610 1% /dev tmpfs 387883 648 387235 1% /run none 3878

Linux显示包含全部的文件系统 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ df -a 文件系统 1K-blocks 已用 可用 已用% 挂载点 /dev/sda8 19554840 7331956 11206500 40% / proc 0 0 0 - /proc sysfs 0 0 0 - /sys none 4 0 4 0% /sys/fs/cgroup none 0 0 0 - /sys/fs/fuse/connections none 0

Linux显示以log结尾的日志文件 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ find -name "*.log" find: `./.gvfs': 权限不够 ./workspace/.metadata/.log ./workspace/.metadata/.plugins/org.eclipse.m2e.logback.configuration/0.log ./workspace/.metadata/.plugins/org.ecli

Linux显示查看您拥有的仓库 youhaidong@youhaidong-ThinkPad-Edge-E545:~$ yum repolist all repolist: 0