Linux

The safest way to kill a process is simply to use the KILL command, with no modifiers, no flags. First use the PS-EF command to determine the PID to kill the process, and then enter the following command: # kill-pid NOTE: Standard KILL command

Before the installation of Linux, at the start, every time to enabling Swap space to stay about 5 minutes. The resolution process is as follows: (1) View startup log Cat/var/log/boot.log To see how long the system spends on that service at boot time

http://saber5d.blog.163.com/blog/static/12799877820115505714538/window Focus forward loop, there will be a pop-up icon ALT + Tab back loop, there will be a pop-up icon Alt+shift+tab Loop forward, no pop-up icon Alt+esc backward loop, no pop-up icon

I've tried the Mount U disk.When the boot mount the first U disk, the general equipment named SDA, and then Umount, and then insert another USB disk, and then mount, found that the device name became SDB.This test has been done several times, found

To configure the Java_home command under Linux:Java_home=/usr/java/jdk1.6.0_07 (after "=" is the JDK installation path)Export Java_home (this sentence to be added, let java_home output)* To set the java_home as a global variable you need to

The first step: Enter # semanage port-l|grep http command to see which ports Part II: Add the port input you want # Semanage Port-a-T http_port_t-p TCP 8889 Part III: View again, enter # Semanage Port-l|grep http Part Fourth: Modify firewall

1.Buddy System The smallest unit of memory is page (4KB), which is based on the use of "partner system algorithm" to help manage different contiguous length of memory segments, 1,2,4,8,16,32,64,128,256,512 and 1024 consecutive page box block

1, the kernel provides two common caching scenarios for the device: A, page caching (pages cache) B, Block caching 2, the kernel manages the data structure used by the page cache The kernel manages page caching through the cardinality tree

---View the default maximum number of file handles for the system, which defaults to 1024 # Ulimit-n 1024 ----See how many handles are open for the current process # Lsof-n|awk ' {print $} ' |sort|uniq-c|sort-nr|more 131 24204 57 24244 57 24231 ....

1. Create a table of contents syntax: mkdir-p ——— continuous creation of directories and subdirectories Mkdir-p Test/test1/test2 2. View the contents of a text file (1) Cat Cat [file]-------Show all the contents of the file cat-n

1. View Linux version number Cat/proc/version can display the Linux kernel version number. Is 3.12 2. View the CPU model Cat/proc/cpuinfo 3. View CPU frequency, memory size and

1. Download (direct to Tsinghua image download) Download link, choose the right version, I tried a few, chose a download the fastest, forgive my slag speed, official website in foreign countries, must look for mirrors, otherwise very slow very

In contact with the SCM before the interruption of this noun, simple understanding, in the CPU normal running program A, suddenly inserted program B, program B can be understood as an interruption. An interrupt mechanism is also provided in the

After the CentOS operation is installed, the system has its own openjdk, first view the relevant installation information: 1. You can use the Java-version command to view the system's own version information with JDK $ java-version Java Version "1.7.

1. Installation See: http://blog.sina.com.cn/s/blog_40d47c890100q5ca.html 2. Own Configuration Master profile:/etc/named.conf Options {listen-on port 53     {any;};     Listen-on-v6 Port 53 {:: 1;};     Directory "/var/named";     Dump-file

Method 1 in the terminal input command: #./PSO > Pso.file 2>&1 & Explanation: The PSO is run directly in the background and the terminal output is stored in the Pso.file file in the current directory. When the client shuts down and then logs back

Show line number: Set nu in command mode Navigate to the specified line: Command mode,: N For example, think of Line 2nd,: 2 In edit mode, ngg like to think of 5th line 5gg (or 5G) Opens the file to the specified line vim +n test.txt View Current

Linux system startup and user Login process analysis: First, the system starts the process 1. Loading kernel 2. Execute INIT Program 3,/etc/rc.d/rc.sysinit? Description: The first script executed by Init 4,/etc/rc.d/rc${runlevel}d/* Description:

LVM Logical Volume new two partitions, change partition ID to 8e (LVM) watch-n 1 ' pvs;echo====;vgs;echo====lvs;df-h/date ' Monitor command[Root@node2 ~]# mkdir/date Create a new mount directory [Root@node2 ~]# PVCREATE/DEV/VDB1 Initializes a

I. The establishment of LVM Partitioning physical partitions and modifying partition labels to LVM [Root@server ~]# fdisk/dev/vdb Command (M for help): T Hex Code (type L to list all codes): 8e PVCREATE/DEV/VDB1 # # #创建物理卷 [root@server206 ~]#