{"id":247,"date":"2020-07-09T19:39:48","date_gmt":"2020-07-09T19:39:48","guid":{"rendered":"http:\/\/sumitjangid.com\/?p=247"},"modified":"2020-07-09T19:45:32","modified_gmt":"2020-07-09T19:45:32","slug":"linux-unix-commands","status":"publish","type":"post","link":"http:\/\/sumitjangid.com\/index.php\/2020\/07\/09\/linux-unix-commands\/","title":{"rendered":"Linux\/Unix commands"},"content":{"rendered":"\n

File Commands<\/p>\n\n\n\n

  1. ls Directory listing <\/li>
  2. ls -al Formatted listing with hidden files <\/li>
  3. ls -lt Sorting the Formatted listing by time modification <\/li>
  4. cd dir Change directory to dir <\/li>
  5. cd Change to home directory <\/li>
  6. pwd Show current working directory <\/li>
  7. mkdir dir Creating a directory dir <\/li>
  8. cat >file Places the standard input into the file <\/li>
  9. more file Output the contents of the file <\/li>
  10. head file Output the first 10 lines of the file <\/li>
  11. tail file Output the last 10 lines of the file <\/li>
  12. tail -f file Output the contents of file as it grows,starting with the last 10 lines <\/li>
  13. touch file Create or update file <\/li>
  14. rm file Deleting the file <\/li>
  15. rm -r dir Deleting the directory <\/li>
  16. rm -f file Force to remove the file <\/li>
  17. rm -rf dir Force to remove the directory dir <\/li>
  18. cp file1 file2 Copy the contents of file1 to file2 <\/li>
  19. cp -r dir1 dir2 Copy dir1 to dir2;create dir2 if not present <\/li>
  20. mv file1 file2 Rename or move file1 to file2,if file2 is an existing directory <\/li>
  21. ln -s file link Create symbolic link link to file<\/li><\/ol>\n\n\n\n

    Process management <\/p>\n\n\n\n

    1. ps To display the currently working processes <\/li>
    2. top Display all running process
      \nUnix\/Linux Command Reference <\/li>
    3. kill pid Kill the process with given pid <\/li>
    4. killall proc Kill all the process named proc <\/li>
    5. pkill pattern Will kill all processes matching the pattern <\/li>
    6. bg List stopped or background jobs,resume a stopped job in the background <\/li>
    7. fg Brings the most recent job to foreground <\/li>
    8. fg n Brings job n to the foreground<\/li><\/ol>\n\n\n\n

      File permission <\/p>\n\n\n\n

      1. chmod octal file Change the permission of file to octal,which can be found separately for user,group,world by adding, \u2022 4-read(r) \u2022 2-write(w) \u2022 1-execute(x)
        \nSearching 1. grep pattern file Search for pattern in file <\/li>
      2. grep -r pattern dir Search recursively for pattern in dir <\/li>
      3. command | grep pattern Search pattern in the output of a command <\/li>
      4. locate file Find all instances of file <\/li>
      5. find . -name filename Searches in the current directory (represented by a period) and below it, for files and directories with names starting with filename 6. pgrep pattern Searches for all the named processes , that matches with the pattern and, by default, returns their ID<\/li><\/ol>\n\n\n\n

        System Info <\/p>\n\n\n\n

        1. date Show the current date and time <\/li>
        2. cal Show this month’s calender <\/li>
        3. uptime Show current uptime <\/li>
        4. w Display who is on line <\/li>
        5. whoami Who you are logged in as Unix\/Linux Command Reference <\/li>
        6. finger user Display information about user <\/li>
        7. uname -a Show kernel information <\/li>
        8. cat \/proc\/cpuinfo Cpu information <\/li>
        9. cat proc\/meminfo Memory information <\/li>
        10. man command Show the manual for command <\/li>
        11. df Show the disk usage <\/li>
        12. du Show directory space usage <\/li>
        13. free Show memory and swap usage <\/li>
        14. whereis app Show possible locations of app <\/li>
        15. which app Show which applications will be run by default<\/li><\/ol>\n\n\n\n

          Compression <\/p>\n\n\n\n

          1. tar cf file.tar file Create tar named file.tar containing file <\/li>
          2. tar xf file.tar Extract the files from file.tar <\/li>
          3. tar czf file.tar.gz files Create a tar with Gzip compression <\/li>
          4. tar xzf file.tar.gz Extract a tar using Gzip <\/li>
          5. tar cjf file.tar.bz2 Create tar with Bzip2 compression <\/li>
          6. tar xjf file.tar.bz2 Extract a tar using Bzip2 <\/li>
          7. gzip file Compresses file and renames it to file.gz <\/li>
          8. gzip -d file.gz Decompresses file.gz back to file<\/li><\/ol>\n\n\n\n

            Network <\/p>\n\n\n\n

            1. ping host Ping host and output results <\/li>
            2. whois domain Get whois information for domains <\/li>
            3. dig domain Get DNS information for domain <\/li>
            4. dig -x host Reverse lookup host <\/li>
            5. wget file Download file <\/li>
            6. wget -c file Continue a stopped download<\/li><\/ol>\n\n\n\n

              Shortcuts <\/p>\n\n\n\n

              1. ctrl+c Halts the current command <\/li>
              2. ctrl+z Stops the current command, resume with fg in the foreground or bg in the background <\/li>
              3. ctrl+d Logout the current session, similar to exit <\/li>
              4. ctrl+w Erases one word in the current line <\/li>
              5. ctrl+u Erases the whole line <\/li>
              6. ctrl+r Type to bring up a recent command <\/li>
              7. !! Repeats the last command <\/li>
              8. exit Logout the current session<\/li><\/ol>\n","protected":false},"excerpt":{"rendered":"

                File Commands ls Directory listing ls -al Formatted listing with hidden files ls -lt Sorting the Formatted listing by time modification cd dir Change directory to dir cd Change to home directory pwd Show current… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[23,1],"tags":[],"_links":{"self":[{"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/posts\/247"}],"collection":[{"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/comments?post=247"}],"version-history":[{"count":2,"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/posts\/247\/revisions"}],"predecessor-version":[{"id":250,"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/posts\/247\/revisions\/250"}],"wp:attachment":[{"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/media?parent=247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/categories?post=247"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sumitjangid.com\/index.php\/wp-json\/wp\/v2\/tags?post=247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}