Shell

This example is to start or close the remote MySQL database with Java shell script, demand reason: After the game server, in order to save memory consumption, need to shut down the server unnecessary database (a server host has multiple MySQL

The execution name of this program$n the nth parameter value of this program, n=1..9$* all parameters of this program, this option can have more than 9 parameters.$# the number of parameters for this program$$ the PID of this program (the current

Today's operation encountered a problem, need to redirect the content to the file, and then rename the use of the file, the result of the redirection has been thrown out of the exception, the following nature will be followed by a variety of

Write a script:1, create a function, can accept two parameters:1) The first parameter is a URL, you can download the file, the second parameter is a directory, that is, the location of the download after the save;2) If the user-given directory does

Move:Ctrl + A: Moves to the beginning of the currently edited command,Ctrl + B: Moves to the end of the currently edited command line,Ctrl + F or->: move by word aligns (toward the end of the command line, forward)Ctrl + B or Alt + F: Move right by

Command editing ability (history):One of the great features of Bash is that "he can remember the commands he used!" "This is a really great feature!" Because I just press "up and down" in the command column to find the front/rear input command! In

1. After opening the terminal prompt, $ represents a normal user, #表示管理员用户root, root is the most privileged user in the Linux system.2. A shell script is usually a text file with a #! start, where #! precedes the interpreter path. Example:

/proc File Systemthe /proc file system in Linux consists of a set of directories and files , mounted ( Mount) with the /proc directory .The/proc file system is a virtual file system that provides an interface to the kernel data structure in the

Similar to other programming languages, the shell supports A for loop.The general format for A for loop is:For variable in list Docommand1command2...commandndoneA list is a sequence of values (numbers, strings, and so on), each separated by a space.

Brief introductionAwk is a powerful text analysis tool, with the search for grep and the editing of SED, which is especially powerful when it comes to analyzing data and generating reports. To put it simply, awk reads the file line-by-row, using

Control and deletion of processesUseKillcommand to terminate a process.usually,terminating a foreground process can be usedCtrl + CKey,However, for a background process, you must use theKillcommand to terminate,we need to first

Bulk Replace directory/proc in script file, for/ETC/INIT.D[Email protected] course_04]# more test.sh #!/bin/bashdir=/procaa= ' ls $DIR ' echo $aa650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/6F/AD/wKiom1WktFCyF39TAAD5F48gmko076.jpg

One. Chown commandThe "chown" command changes the owner of the file and the user group. Each file belongs to one user group and one user. In your directory, use "Ls-l" and you will see something like this.[Email protected]:~# ls-lDrwxr-xr-x 3 server

Spark 1.4 was downloaded and the following error was encountered while running Spark-shell: Java.net.unknownhostexception:ukon-m-q0ep:ukon-m-q0ep:nodename nor servname provided, or not knownAt Java.net.InetAddress.getLocalHost

Shell type, version and selectionAnyone who uses *inx, whether as a loginThe shell is also programmed to touch the shell.After years ofDevelopment, a wide variety of shells. In addition to our familiar sh, ksh, CSH, bash ... , there are various free

computers with UEFI bios are not available to all netizens, and VMware (8.0 or more) is now being created to enable everyone to experience "UEFI" the "Uefi virtual Machine", which was provided last year, is now re-provided for the completeness of

Strictly speaking, there is no concept of an expression in the shell. The shell itself is really just a collection of commands, and of course it is not a random heap, but a certain organization. But this organization is not so rigorous, so this

The simple use of the remote SCP file shell expect is implemented in shell scripts with expect http://myunix.blog.51cto.com/191254/1095074http:// Jie-hui-520.blog.163.com/blog/static/60074301201022610217249/linux rsync Synchronous Practice Http://my.

Thinking: (1) get "." The I node number, called N (using stat)(2) ChDir. (using ChDir)(3) Find the node with inode number n and get its file name.Repeat the above operation until the current folder "." The inode value equals "..." The Inode

Install bash shell and solarisbashshell on solarisA bash vulnerability exists in earlier versions of sun solaris, which can be solved by uninstalling or upgrading.1. All pkg installation packages:Http://mirror.opencsw.org/opencsw/allpkgs/ 2,