Apple Mac OS System shell command Daquan Introduction

Basic command 1, list file ls parameter directory name         Example: see what's in the driver directory: ls/system/library/extensions parameter-w display Chinese,-l details,-a including hidden file 2, turn Change directory      CD     Example: Think of a drive directory to stroll around   cd/system/library/extensions 3, create a new directory mkdir directory name & nbsp   Example: Build a backup directory under the drive directory backup     MKDIR/SYSTEM/LIBRARY/EXTENSIONS/BACKUP build a backup directory on the desktop back up catalog backup     mkdir/user/user name/desktop/backup 4, copy file CP parameter source file target file     example: Want to copy the Natit.kext of the desktop to the driver directory  cp-r/user/user name/ The Desktop/natit.kext/system/library/extensions parameter R indicates a recursive operation of the directory, and Kext looks like a file under the graphical interface, which is actually a folder. Back up all files in the drive directory to the desktop Backupcp-r/system/library/extensions/*/user/username/desktop/backup 5, delete file rm parameter file   Example: To delete a driver's cache  rm-rf/system/library/extensions.kextcache     rm-rf/system/library/ Extensions.mkext parameter-rf means recursive and mandatory, be careful to use, if executed RM-RF/your system is all gone  6, move file mv File   example: Want to move Applehda.kext to the desktop   &NBSP ; mv/system/library/extensions/applehda.kext/user/user name/desktop want to move Applehda.kext to the backup directory   mv/system/library/extensions/applehda.kext/system/library/extensions/backup 7, text editing nano file name   Example: Edit Natit Info.plist     nano/system/library/extensions/natit.kext/info.plist  directory operations   command name                       function description                   &NBSP ;                         Use example  mkdir       & nbsp                 Create a directory                 &NBS P                     mkdir dirname rmdir                         Delete a directory                 &N Bsp                     rmdir dirname mvdir                        Move or rename a directory                         Mvdir Dir1 dir2 cd                             Change current directory                               &NB Sp       CD dirname pwd                       &NBS P   Show path name of current directory                          pwd ls &NB Sp                           Show content of current directory     & nbsp                       ls-la    file operations   command name                               &nbsp   function Description   ;                              CAT   Use example   &NBS P                                   display or even File                       Cat filename    &nbsp : od                                       Display the contents of non-text files            od-c FILENAME CP         &NBS P                             Copy files or directories     &NB Sp                  CP file1 file2 rm           &N Bsp                         Delete files or directories         &N Bsp &nBsp             RM filename mv                 &NBS P                   Change file name or directory               MV File1 file2   find                         (+) nbsp         Find files using matching expressions             find. -name "*.C"-print file                           &N Bsp       Show file types                           &NBS P    file filename  Select action   command name                             Function description                           &NBS P           Use examples  head                               Show text First few lines of the piece                       head-20 filename tail   &NB Sp                           show the last few lines of the file                       tail-15 filename cut         &NBS P                       show files in each row of some fields                 cut-f1,7-d:/etc/passwd colrm                             remove several columns from standard input                  COLRM 8 fil E2   diff                          /      ratioDiff and show two file differences                diff file1 file2     sort &NB Sp                           Sort or merge files       &N Bsp                              sort-d-f-u file 1 uniq                           eliminate duplicate lines in a file   &N Bsp                              uniq file1 FILE2&N Bsp;comm                         show both public and non-public lines of two ordered documents              comm file1 FILE2 WC                             Statistics file characters, words and lines                    WC F Ilename&nbsP;NL                             To add line numbers   &nbs P                          ,         &NB Sp NL file1 >file2          Process Operations   command name                     function description                     &NBSP ;                           Use example  ps     &NBS P                     show the current status of the process             & nbsp                       PS U kill         &N Bsp               End-of-process                   &NBSP ;                                kill-9 30142&nbs p;     time Action   command name                       &NBSP ;   Function Description                               &NBSP ;             Use examples  date                   &NB SP; display the current date and time of the system                           Date cal & nbsp                           &nbsp     Show Calendar ;                          ,         &NB Sp Cal 8 1996 time                         The execution time of the statistical program     &nbsp                      time a.out  Network and Communication Operations   command name                                 function description     &NBSP ;                                 Use example   Telnet                                 &NB SP, remote login                                 TE Lnet hpc.sp.net.edu.cn rlogin                         &NB Sp       telnet                           &NBSP ;     Rlogin hostname-l username rsh                     & nbsp In the remote masterMachine Execution Command                             F01N03 rsh date& Nbsp;ftp                   to transfer files between localhost and remote host         &NBSP ;      FTPFTP.SP.NET.EDU.CN RCP                 to copy the text between the local host and the remote host Parts               RCP file1 host1:file2 ping           &NBS P       Send a response request to a web host                   Ping hpc.sp.net.edu.cn& Nbsp;mail                           review and email   &NBSP ;                          ,         &NB Sp  mail write                       to send a message to another user                                  write username PTS/1 MESG                     Allow or deny receive messages             & nbsp                              /    MES G N korn shell command                 command name                                 function description           &NBSP ;                             Use example  history               list recently executed commands and numbers                       History r                         re-executed recently executed One of the commands   &NBsp                        r-2 alias       &N Bsp                     Define an alias for a command             & nbsp                    alias del=rm-i unalias       &NB Sp             Cancel the definition of an alias                                  unalias del  other commands   command name                                   function description                                         Use example  uname                     Show operating system Information             &NBSP ; &nBsp              uname-a clear               &NBSP ;       Clear screen or window content                                        clear env                 &NB Sp       Show all currently set environment variables                         ENV  who                       List all users currently logged in       &N Bsp                            who whoami   &N Bsp               Show user name currently in action                 &NBS P            whoami tty                   &NBsp     Display terminal or pseudo-terminal name                           &NBSP ;             Tty stty                   &NB Sp     Display or reset control key definition                                        STTY-A DU                 and nbsp               Query disk usage                   &N Bsp     Du-k subdirdf/tmp                         &NBS p; Show file system total space and free space  w                                 Show total information for current system activity

Apple Mac OS System shell command Daquan introduction