best linux command line tools

Tags: database SQ server use PSQL Data DTS Service System1. Connect to the server:Psql-h 192.168.1.88-u username-d DatabaseName2. Switch the database:\c dbname3. List all databases:\l4. List all current database tables:\d5. List all the fields of the table:\d TableName6. List the basic conditions of the table:\d+ TableName7. Exit\q8. View Help\?9. View the index:\di10. View the system table:\dts11. View the User:\du or \DG12. View the View:\DV or \d+ viewnameGreenplum Management TipsTo view the

View file contents: Cat/etc/shadow All contentsThe cat command is all outputCat/etc/shadow-n output content and line number, empty industry outputCat/etc/shadow-b output content and line numbers, but no spaces are outputTac/tmp/cat.txt file contents in turn lookShow all results first and then show 15 rows showing the first 15 rows: Cat-n/etc/shadow | Head-n 15Sho

, shell cannot fully mobilize computer functions. (For more information about shell, see Linux architecture and Linux Command lines and commands) Guido hopes to have a language that can fully call computer functional interfaces like the C language, and programming as easily as shell. The ABC language allows Guido to see what they want. ABC is composed of CW

login:get_logname no source code elsewhere while((logname = Get_logname ()) = =0)/* Do nothing * /;··//Omit part of source codeexecl (Loginprog, Loginprog, autologin?)"-F":"--", logname, NULL);/* Replace login program here to implement authentication user name password Note: global variable static char *loginprog = "/bin/login"; */Static voidDo_prompt (intShowlogin) {FILE *fd;intCif(Nonewline = =0)Putchar(' \ n ');if(Noissue = =0 (fd = fopen ("/etc/issue","R"))) { while((c = getc (FD))!

Users who frequently use Linux must have a good understanding of Linux commands. The command line method of Linux has powerful functions. Maybe you know some simple commands. How can a complicated advanced command

Article Title: Linux (FC) Tips for adding a line number in the VI command line. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research

-N: Add line numbers to all lines -B: Add line numbers to lines with text only -S: Compress multiple blank rows into a single blank line -T: Hide tabs More commands The more command implements the text content, but stops after each

In the Linux world, the most indispensable is the Linux Command Line application. The Linux Command Line can help us quickly find what we want, complete what we want to do, and complete

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Linux commands are important tools and are often the biggest bottleneck for beginners. A friend with a long time Linux GUI, basically do not use command line Input

package.　　Ant TestRun the test. The prerequisite is to install the. apk file that is ready for testing beforehand.　　Ant Debug Installt TestBuild the test project and the project under test, install two. apk files and run the tests.　　Ant Emma Debug Install TestBuild test projects and tested projects, install two. apk files, run tests, and support code coverage testing.Note:[1] If you use Eclipse for development, you may not find the Build.xml file in the project root because Eclipse has its own

At the beginning, I thought of using PHP's built-in ZipArchive, just like a common young man, to use PHP to call the Linux command line and execute the compression command, instead of installing the zip extension in the environment, if you are interested, you may want to learn about it. I hope this article will help yo

Linux Command Line reports bash :.....: command not found solution: run the command on the Linux command Line and report "bash :....:

At the beginning, I thought of using PHP's built-in ZipArchive, just like a common young man, to use PHP to call the Linux command line and execute the compression command, instead of installing the zip extension in the environment, if you are interested, you may want to learn about it. I hope this article will help yo

A few days ago work, need to 3 TXT file, packaged into *.zip down to the local ... In the beginning, like the average youth, I thought that with PHP's built-in ziparchive, the code would look like this: Copy Code code as follows: /* split into 3 txt files are wow_1.txt wow_2.txt and wow_3.txt*/ $zip =new ziparchive (); $zipfile = './exl_file/wow.zip '; if ($zip->open ($zipfile, ziparchive::create) ===true) { $zip->addfile ('./exl_file/wow_1.txt ', ' wow_1.txt '); $zip->

During work a few days ago, You Need To package three txt files into *. zip down to local ......In the first place, I thought of ZipArchive built in PHP like a common young man. The code looks like this:Copy codeThe Code is as follows:/* Split the file into three txt files: wow_1.txt wow_2.txt and wow_3.txt */$ Zip = new ZipArchive ();$ Zipfile = './Exl_file/wow.zip ';If ($ zip-> open ($ zipfile, ZIPARCHIVE: CREATE) === TRUE ){$ Zip-> addFile ('./Exl_file/wow_1.txt', 'wow_1.txt ');$ Zip-> addFil

During work a few days ago, You Need To package three txt files into *. zip down to local ...... In the first place, I thought of ZipArchive built in PHP like a common young man. The code looks like this: Copy codeThe Code is as follows:/* split the file into three txt files, which are wow_1.txt wow_2.txt and wow_3.txt */ $ Zip = new ZipArchive (); $ Zipfile = './Exl_file/wow.zip '; If ($ zip-> open ($ zipfile, ZIPARCHIVE: CREATE) === TRUE ){ $ Zip-> addFile ('./Exl_file/wow_1.txt', 'wow_1.txt '

introducing the background knowledge, let's take a look at the usage of these command parameters: 1. Some commands in Linux use LS-A (the front of the parameter) like this ); 2. Some commands use CP -- Help (the first two parameters) in this way ); 3. Use tar-xzvf (a horizontal line exists before the parameter ); 4. In this case, tar xzvf is used (the parameter

Old boy training quotations-habits] linux Command Line command line Command Re-query (this article will not talk about backup and Management of the Enter key before command knock)Conclu

Some shortcut keys for the bash command line:Ctrl +a: Jump to the beginning of the commandCtrl+e: Jump to the end of the command lineCtrl+d: Delete keyCtrl+u: Delete cursor to the beginning of commandCTRL +K: Delete cursor to end of command lineCtrl+l: Clear ScreenHistorical History Command:-C: Clear all inside command

. txtc:\users\cashey\desktop\testdir\doc\2. txtc:\users\cashey\desktop\testdir\src\test.py# Find all txt files in the TestDir directory and all subdirectoriesC:\users\cashey\desktop> for/R TestDir%iinch(*.txt) Do@Echo%ic:\users\cashey\desktop\testdir\doc\1. txtc:\users\cashey\desktop\testdir\doc\2. txt# Find all txt and jpg files in the TestDir directory and all subdirectoriesC:\users\cashey\desktop> for/R TestDir%iinch(*.txt,*.jpg) Do@Echo%ic:\users\cashey\desktop\testdir\b.jpgc:\users\cashey\d