innotek command series

This original article belongs to "Linux greenhouse" blog, the blog address is http://roclinux.cn. The author of the article is rocrocket.In order to prevent the vicious reproduction of some websites, special in each article before adding this information, but also hope that readers understand. ===[Start of body]In the previous article in this series, which covers the Cut command (five-minute

a updatedb, again with locate will be able to findUpdateDB commands the Linux system to execute automatically every day, for files with low real-time requirements can not be executed manually updatedb command2. which and Whereis commandsThe which command is used to find the absolute path to an executable file from a directory defined by the system's path variable. For example, to find the path to the LS commandThe Whereis

This original article belongs to the "Linux Greenhouse" blog.The blog address is http://roclinux.cn.Article author for RocI hope you can donate to support the operation and development of the Linux greenhouse blog. See "About Donations"==I haven't made this series in a long time. have been looking at Perl. Now return. Because all scripts are found to be based on Linux commands ...= =In Layman's words, a Job control

file after execution. -p> password using zip option. -Q does not display any information when executing-S converts white space characters in the file name to baseline characters.-V retains the file version information for the VMS. -X Unzip while the original uid/gid of the file is stored back . [. zip file ] Specifies a . zip compressed file. [File ] Specifies which files in the. zip archive to process. -d> Specifies the directory to be stored after the file has been decompressed. -x> Specifies

" "Time"-C cancels the previous shutdown command-H shutdown-R RestartExample 1: Shut down immediately: Shutdown-h nowExample 2: Evening 8:30 shutdown: shutdown-h 20:30　　Note: It is recommended to use this command to shut down the system before this command shuts down properly.Second, other shutdown commands①, halt②, Poweroff③, Init0Iii. Other Restart commands①, r

subdirectories.3.Lists the size of all directories and files under the ABC directory and its subdirectories:# Du-ah ABC-a means including directories and files4.Lists the size of the directory names in all ABC directories that do not include the XYZ string:# du-h–exclude= ' *xyz* '5.To get more information about the ABC directory and the size of subdirectories on one screen:# du-0h ABC0 (bar 0) indicates the information for each directory listed, not wrapping, but outputting the information of

sudoers file dedicated command Visudo, Here we use Visudo to edit, you can see the root user sudo permissions:This line means that the root user (the first column), log in from anywhere (all of the second column), can execute any command (all of the third column) of any person (all of the fourth column), and according to this definition, we add the User1 permissionAfter saving exit, execute the sudo userad

what AWK looks for in the data, and the action is a series of commands that are executed when the matching content is found. Curly braces ({}) do not need to appear in the program at all times, but they are used to group a series of instructions according to a specific pattern. pattern is the regular expression to be represented, surrounded by slashes. The most basic function of the awk language is to bro

the symbolic connection of the directory? The reason is that in the Linux system, each file (directory is also a file) corresponds to an inode structure, where the Inode data structure contains the file type (directory, ordinary files, symbolic connection files and so on) information, which means that the operating system can traverse the directory to determine the symbolic connection, Since you can determine the symbolic connection of course, you can take some measures to prevent entering a la

(MFC Application series) menu command routing (Lesson 6), mfc menu commandI. Classification of Windows messages ① except for WM_COMMAND, all messages starting with WM _ are standard messages. Classes derived from the CWnd class can receive such messages. ② The command message comes from the menu, the accelerator key, and the toolbar. Such messages are displayed i

root directory to the test folderAlso we can rename a file by moving a file in the same directory, for example, we have the name of the Test.txt Test.doc, only need to use MV Test.txt Test.docMove multiple files, you can enter more than one file name, compare we want to put the test folder below the two files Test.txt,test2.txt moved to the Test2 folder below, you can use the following command4. View files: Cat commandBasic usage: Cat file nameFor example, we want to view/var/log/maillog, we ca

is written to the/tmp/test.txt fileAfter you save the exit, you can see that the hello is output in the/tmp/test.txtMore examples:* */1 * * * echo ' hello ' >>/tmp/test.txtIndicates hourly execution* 23-3/1 * * * echo ' hello ' >>/tmp/test.txtIndicates that 23 to 3 points are executed every hour.* * * echo ' hello ' >>/tmp/test.txtTo be executed 8:30 every night.1 * * echo ' hello ' >>/tmp/test.txtIndicates 1th # 10:10 per month to perform operations1 1 * echo ' hello ' >>/tmp/test.txtRepresent

[Email protected] ~]# tar-n "2005/06/01"-ZCVF home.tar.gz/home example Seven: I want to back up/home ,/etc , but don't /home/dmtsai[Email protected] ~]# tar--exclude/home/dmtsai-zcvf myfile.tar.gz/home/*/etc example eight: Will /etc/ Unpacking directly in/ tmp underneath, without producing files! [Email protected] ~]# cd/tmp[Email protected] tmp]# TAR-CVF-etc | tar-xvf-# It's kind of like a cp-r/etc/tmp . There is still a use for it!# The point to note is that the output file becomes - an

the AT–C task IDAbove, only the most core information is displayed, you can see our command is LL.The time format of the AT command can beMinute??? At now + 5 minutes?? The task runs after 5 minutesHour????? At now + 1 hour????? The task runs after 1 hoursDays????? At now + 3 days????? The task runs after 3 daysWeeks???? At now + 2 weeks???? The task runs after two weeksFixed???? At midnight????????? Task

written to the/tmp/test.txt fileAfter you save the exit, you can see that the hello is output in the/tmp/test.txtMore examples:* */1 * * * echo ' hello ' >>/tmp/test.txtIndicates hourly execution* 23-3/1 * * * echo ' hello ' >>/tmp/test.txtIndicates that 23 to 3 points are executed every hour.* * * echo ' hello ' >>/tmp/test.txtTo be executed 8:30 every night.1 * * echo ' hello ' >>/tmp/test.txtIndicates 1th # 10:10 per month to perform operations1 1 * echo ' hello ' >>/tmp/test.txtRepresents a

This original article belongs to the "Linux Greenhouse" blog.The blog address is http://roclinux.cn.Article author for RocI hope you can donate to support the operation and development of the Linux greenhouse blog. See "About Donations"==Chkconfig are often used when operating on the command line. It makes it easy to set up services that start at each system runlevel. This can be mastered well, with proficiency, you can easily manage your start-up ser

, how do you unzip it?# TAR-XJVF ROC.TAR.BZ2Note: The J option indicates the use of the BUNZIP2 tool. (Yegle said can omit J, that is, do not specify a special compression tool, only with-XVF.) This is also true of ^_^)2 I have a file abc.txt, I want to compress with BUNZIP2 compression tool!#bzip2 Abc.txtNote: compression will get a compressed file abc.txt.bz2, while the original abc.txt will be deleted. (This is important, as the Linux test will ask)3 If there is a file abc.txt.bz2, want to de

Tags: System/OPS LinuxPrevious section review:1. Locate command2. Whereis,which commandJob: Create a file myfile.txt, find it with locate, and find the CD command with which and Whereis, respectivelyTouch MyFile.txtLocate MyFile.txtUpdateDBLocate MyFile.txtWhereis CDwhich CD1. gzip/gunzipGzip is used to compress files in place, it is simple to use, for example, we want to compress the messages file under/var/log, can be used directly with GZIP messag

ancient scripts, here's another way to say that, the plus sign represents the start section, and the minus sign represents the end section.) The most important point is that this approach is counted from 0, the first field that was previously said, and is represented as a No. 0 field. The previous 2nd character, represented here as the 1th character. Got it? ）Conclusion:This article is the only comparison of the internet on the K-option of the sort of the article, if you want to reprint please

standard output and exits.List subdirectories only1. Ls-f | grep/$ or alias sub = "Ls-f | grep/$ "(Linux)2. Ls-l | grep "^d" or Ls-ll | grep "^d" (Solaris)Calculate the number of files and directories in the current directoryThe following command can calculate the number of files and directories in the current directory, respectively:# ls-l * |grep "^-" |wc-l----to count files# ls-l * |grep "^d" |wc-l-----to Count dirDisplay a list of color catalogsO