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INTRODUCTION
BASH
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ANDRÉ SANTOS
FRANCISCO NEVES
62Gerente [email protected] andre-santos.pt
francisconeves [email protected] francisconeves.com
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No content
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UNIX BASED SYSTEMS
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UNIX BASED SYSTEMS
STABILITY
PERFORMANCE
SCALABILITY
COMPATIBILITY
PRICE
VS WINDOWS
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BASH?
‣WHAT DOES IT MEAN?
‣ADVANTAGES?
WHAT IS
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BASH?
‣AUTOCOMPLETE
‣MAN PAGES
‣CLEAR SCREEN
HOW TO DEAL WITH
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COMMANDS
SOME REQUIRED
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LIST ls -a
-l
ALL FILES
LONG FORMAT
MAKE
DIRECTORY mkdir [OPT] DIR
-p MAKE PARENTS
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CHANGE
DIRECTORY cd PATH . CURRENT DIR
~
.. PARENT DIR
HOME DIR
PRINT WORKING
DIRECTORY
pwd
CREATE
EMPTY FILE touch FILE
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COPY cp [OPT] FROM TO
MOVE OR
RENAME mv FROM TO
-r COPY DIRECTORIES RECURSIVELY
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REMOVE rm [OPT] FILE
REMOVE
DIRECTORY rmdir [OPT] DIR
-r RECURSIVELY REMOVE DIRECTORIES
-f FORCE
-p PARENTS
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CONCATENATE
AND PRINT FILES
cat [OPT] FILES
less [OPT] FILE
-N NUMBER THE OUTPUT LINES
VIEW FILE
-l NUMBER THE OUTPUT LINES
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FREQUENT COMMANDS
LESS
Key COMMAND
Space NEXT PAGE
b PREVIOUS PAGE
j NEXT LINE
k PREVIOUS LINE
g FIRST LINE
G LAST LINE
G LINE
Key COMMAND
/ FOWARD SEARCH FOR
? BACKWARD SEARCH FOR
n NEXT SEARCH MATCH
N PREVIOUS SEARCH MATCH
= FILE INFORMATION
h HELP
q QUIT
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DISPLAY
FIRST LINES
head [OPT] FILE
tail [OPT] FILE
-n LAST N LINES
-n FIRST N LINES
DISPLAY
LAST LINES
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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
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WORD COUNT
wc [OPT] FILE
-l LINE COUNT
-c BYTE COUNT
-m CHARACTER COUNT
-w WORD COUNT
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COMMANDS
CTRL-KEY
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KILL PROCESS CTRL + C
STOP PROCESS CTRL + Z
END OF FILE CTRL + D
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REDIRECTION
I/O
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COMMAND > FILE
REDIRECT STDOUT TO A FILE
OVERWRITE
COMMAND >> FILE
REDIRECT STDIN TO A FILE
APPEND
COMMAND < FILE
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COMMAND1 | COMMAND2 | COMMAND3
REDIRECT THE OUTPUT FROM ONE COMMAND AS
INPUT TO THE NEXT ONE
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WILDCARDS
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WHAT ARE
WILDCARDS?
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*
? ANY SINGLE CHARACTER
ANY NUMBER OF CHARACTERS
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SECURITY
SYSTEM AND
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PERMISSIONS
UNIX
sudo [OPT] [USER] COMMAND
ALLOWS USERS TO RUN PROGRAMS WITH THE
SECURITY PRIVILEGES OF ANOTHER USER
NORMALLY THE ROOT
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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
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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
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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
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top
DISPLAY TOP CPU PROCESSES
ps
REPORTS THE PROCESS STATUS
-e
FULL LISTING
ALL PROCESSES
-f
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LEAST
LAST BUT NOT
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history -c CLEAR
LAST COMMANDS USED
time COMMAND
TIME COMMAND EXECUTION
diff
COMPARE FILES LINE BY LINE
!* LAST MATCHED COMMAND
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WALK A FILE HIERARCHY
find PATH [OPT] [EXPRESSION]
-name FIND BY NAME
-size FIND BY SIZE
-iname CASE INSENSITIVE MODE
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