{"id":167,"date":"2017-05-01T02:27:11","date_gmt":"2017-05-01T02:27:11","guid":{"rendered":"http:\/\/blog.staginginstance.com\/?p=167"},"modified":"2018-04-30T22:11:18","modified_gmt":"2018-04-30T22:11:18","slug":"important-linux-ubuntu-commands","status":"publish","type":"post","link":"https:\/\/geekabhi.com\/blog\/important-linux-ubuntu-commands\/","title":{"rendered":"Important Linux + ubuntu + centos commands"},"content":{"rendered":"

We daily come across in need of various Linux + ubuntu + centos commands while updating our server and it becomes hard to remember each and every command by tips. So i thought of adding all commands at one place.<\/p>\n

    \n
  1. Linux version :\u00a0cat \/etc\/*elease<\/code><\/strong><\/li>\n
  2. Check if linux is 32 Bit or 64 Bit :\u00a0cat \/etc\/*elease<\/code><\/strong><\/li>\n
  3. Connect to mysql using command line :\u00a0mysql -u username -pPassword<\/code><\/code><\/strong><\/li>\n
  4. Backup mysql table in a file on server:\u00a0mysql -u username\u00a0-p --database=your_dbname\u00a0--host=your_hostname --port=3306 --batch -e \"select * from table_name\" | sed 's\/\\t\/\",\"\/g;s\/^\/\"\/;s\/$\/\"\/;s\/\\n\/\/g' >\u00a0your_backup_filename<\/code><\/strong><\/li>\n
  5. Current disk usage: \u00a0df -h<\/code><\/strong><\/li>\n
  6. Memory usage: free -m<\/code><\/strong><\/li>\n
  7. Delete folder and files in it: \u00a0rm -rf folder-name<\/code><\/strong><\/li>\n
  8. Check log activity: tail -f *path-to-log*. Eg: tail -f \/var\/log\/apache2\/error.log<\/code><\/strong><\/li>\n
  9. Enable any module: sudo a2enmod *module-name*. Eg:\u00a0sudo a2enmod rewrite<\/code><\/code><\/strong><\/li>\n
  10. Zip file: sudo zip -r file.zip folder\/<\/code><\/strong><\/li>\n
  11. To list the largest directories from the current directory in human readable format:\u00a0du -sh * | sort -hr | head -n10<\/code><\/strong><\/li>\n
  12. To Recursively list all files in a directory including files in symlink directories: find -follow<\/code><\/strong><\/li>\n
  13. List all users in linux:\u00a0cat \/etc\/passwd<\/code><\/strong><\/li>\n
  14. Add a linux user:\u00a0sudo<\/span> adduser newuser<\/code><\/em><\/code><\/strong><\/li>\n
  15. Delete a linux user:\u00a0sudo<\/span> userdel -r olduser<\/code><\/em><\/code><\/strong><\/li>\n
  16. Create Swap memory in linux:\n
      \n
    1. Command 1:<\/strong> sudo dd if=\/dev\/zero of=\/swapfile bs=1G count=4<\/code><\/strong><\/li>\n
    2. Command 2:\u00a0sudo chmod 600 \/swapfile<\/code><\/strong><\/li>\n
    3. Command 3: sudo mkswap \/swapfile<\/code><\/strong><\/li>\n<\/ol>\n<\/li>\n
    4. Unzip file:If the unzip<\/code> command isn’t already installed on your system, then run:\n
        \n
      1. Install unzip:\u00a0sudo apt-get install unzip<\/code><\/strong><\/li>\n
      2. After installing the unzip utility, if you want to extract to a particular destination folder, you can use:\u00a0unzip file.zip -d destination_folder<\/code><\/strong><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

        We daily come across in need of various Linux + ubuntu + centos commands while updating our server and it becomes hard to remember each and every command by tips. So i thought of adding all commands at one place. Linux version :\u00a0cat \/etc\/*elease Check if linux is 32 Bit or 64 Bit :\u00a0cat \/etc\/*elease… Continue reading Important Linux + ubuntu + centos commands<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[10,9,11],"yoast_head":"\nImportant Linux + ubuntu + centos commands - Learner at life<\/title>\n<meta name=\"description\" content=\"We daily come across in need of various Linux + ubuntu commands while updating our server and it becomes hard to remember each and every command by tips\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/geekabhi.com\/blog\/important-linux-ubuntu-commands\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Important Linux + ubuntu + centos commands - 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