Bash Introduction

Introduction to the Unix command line

Transcript

1. INTRODUCTION BASH
2. ANDRÉ SANTOS FRANCISCO NEVES 62Gerente andreccdr@gmail.com andre-santos.pt francisconeves contact@francisconeves.com francisconeves.com
4. UNIX BASED SYSTEMS
5. UNIX BASED SYSTEMS STABILITY PERFORMANCE SCALABILITY COMPATIBILITY PRICE VS WINDOWS
6. BASH? ‣WHAT DOES IT MEAN? ‣ADVANTAGES? WHAT IS
7. BASH? ‣AUTOCOMPLETE ‣MAN PAGES ‣CLEAR SCREEN HOW TO DEAL WITH
8. COMMANDS SOME REQUIRED
9. LIST ls -a -l ALL FILES LONG FORMAT MAKE DIRECTORY mkdir [OPT] DIR -p MAKE PARENTS
10. CHANGE DIRECTORY cd PATH . CURRENT DIR ~ .. PARENT DIR HOME DIR PRINT WORKING DIRECTORY pwd CREATE EMPTY FILE touch FILE
11. COPY cp [OPT] FROM TO MOVE OR RENAME mv FROM TO -r COPY DIRECTORIES RECURSIVELY
12. REMOVE rm [OPT] FILE REMOVE DIRECTORY rmdir [OPT] DIR -r RECURSIVELY REMOVE DIRECTORIES -f FORCE -p PARENTS
13. CONCATENATE AND PRINT FILES cat [OPT] FILES less [OPT] FILE -N NUMBER THE OUTPUT LINES VIEW FILE -l NUMBER THE OUTPUT LINES
14. FREQUENT COMMANDS LESS Key COMMAND Space NEXT PAGE b PREVIOUS PAGE j NEXT LINE k PREVIOUS LINE g FIRST LINE G LAST LINE <n>G LINE <n> Key COMMAND /<text> FOWARD SEARCH FOR <TEXT> ?<text> BACKWARD SEARCH FOR <TEXT> n NEXT SEARCH MATCH N PREVIOUS SEARCH MATCH = FILE INFORMATION h HELP q QUIT
15. DISPLAY FIRST LINES head [OPT] FILE tail [OPT] FILE -n LAST N LINES -n FIRST N LINES DISPLAY LAST LINES
16. PRINT LINES MATCHING A PATTERN grep [OPT] PATTERN [FILE...] -c DISPLAY THE NUMBER OF MATCHED LINES -i IGNORE CASE SENSITIVITY -l DISPLAY THE FILENAMES -n DISPLAY THE LINE NUMBERS -w MATCH WHOLE WORD
17. WORD COUNT wc [OPT] FILE -l LINE COUNT -c BYTE COUNT -m CHARACTER COUNT -w WORD COUNT
18. COMMANDS CTRL-KEY
19. KILL PROCESS CTRL + C STOP PROCESS CTRL + Z END OF FILE CTRL + D
20. REDIRECTION I/O
21. COMMAND > FILE REDIRECT STDOUT TO A FILE OVERWRITE COMMAND >> FILE REDIRECT STDIN TO A FILE APPEND COMMAND < FILE
22. COMMAND1 | COMMAND2 | COMMAND3 REDIRECT THE OUTPUT FROM ONE COMMAND AS INPUT TO THE NEXT ONE
23. WILDCARDS
24. WHAT ARE WILDCARDS?
25. * ? ANY SINGLE CHARACTER ANY NUMBER OF CHARACTERS
26. SECURITY SYSTEM AND
27. PERMISSIONS UNIX sudo [OPT] [USER] COMMAND ALLOWS USERS TO RUN PROGRAMS WITH THE SECURITY PRIVILEGES OF ANOTHER USER NORMALLY THE ROOT
28. PERMISSIONS UNIX u u u g g g o o o user user user group group group others others others r w x r w x r w x 4 2 1 4 2 1 4 2 1 a = all 7
29. CHANGE PERMISSIONS chmod [OPT] MODE FILE -R RECURSIVELY +rx g-w 777 READ AND EXECUTE FOR ALL DENY WRITE ACESS FOR GROUP READ, WRITE AND EXECUTE FOR ALL
30. PROCESSES UNIX COMMAND & RUN PROCESS ON BACKGROUND jobs BACKGROUND OR SUSPENDED PROCESSES kill SIGNAL PROCESS SEND SIGNAL TO A PROCESS killall PROCESS KILL PROCESS BY NAME
31. top DISPLAY TOP CPU PROCESSES ps REPORTS THE PROCESS STATUS -e FULL LISTING ALL PROCESSES -f
32. LEAST LAST BUT NOT
33. history -c CLEAR LAST COMMANDS USED time COMMAND TIME COMMAND EXECUTION diff COMPARE FILES LINE BY LINE !* LAST MATCHED COMMAND
34. WALK A FILE HIERARCHY find PATH [OPT] [EXPRESSION] -name FIND BY NAME -size FIND BY SIZE -iname CASE INSENSITIVE MODE
35. ?