Unix Shell Programming Third Edition phần 5 pptx
Unix Shell Programming Third Edition phần 5 pptx
... (standard input)
$ run memo3
request id is laser1- 35 (standard input)
$ run memo4
request id is laser1-36 (standard input)
$
Incidentally, the shell permits filename substitution in the list of ... special notation is recognized by the shell when writing for commands. If you write
for var
do
command
command
done
(note the absence of the in), the shell automatically sequences throu...
Unix Shell Programming Third Edition phần 4 pptx
... Pizza' Remove this entry
$ cat phonebook
Alice Chebba 973 -55 5-20 15
Barbara Swingle 201 -55 5-9 257
Billy Bach 201 -55 5-7618
Liz Stachiw 212 -55 5-2298
to achieve the same result. The double quotes are ... character
5.
In the second test, the integer comparison operator -eq is used. Treating the two values as integers,
0 05 is equal to 5, as verified by the exit status returned...
Unix Shell Programming Third Edition phần 10 pptx
...
Bash shell
beginning of line, matching 2nd
bg command 2nd 3rd 4th 5th 6th
books
AWK Programming Language, The
Learning Pearl
Programming Pearl
Unix C Shell Field Guide, The
Unix in ... Shell Field Guide, The
Unix in a Nutshell[colon] System V Edition
Unix Programmer's Manual, Volume II
Unix Programming Environment, The
Bourne shell
Bourne, S...
Unix Shell Programming Third Edition phần 1 doc
... -l
total 5
-rwxr-xr-x 1 steve DP37 25 358 Jun 25 13:31 collect
-rwxr-xr-x 1 steve DP37 25 1219 Jun 25 13:31 mon
-rwxr-xr-x 2 steve DP37 25 89 Jun 25 13:30 wb
-rwxr-xr-x 2 steve DP37 25 89 Jun 25 13:30 ... shell, such as
bash. Three are covered in the third edition of Unix Shell Programming. It begins with a generalized
tutorial of Unix and tools and then moves into detai...
Unix Shell Programming Third Edition phần 2 pot
... phonebook
Alice Chebba\t973 -55 5-20 15
Barbara Swingle\t201 -55 5-9 257
Jeff Goldberg\t201 -55 5-3378
Liz Stachiw\t212 -55 5-2298
Susan Goldberg\t201 -55 5-7776
Tony Iannino\t973 -55 5-12 95
$
The output verifies ... in
(212) 55 5-0040
$
You can use paste to print the names and numbers side-by-side as shown:
$ paste names numbers Paste them together
Tony (307) 55 5 -53 56
Emanuel (212)...
Unix Shell Programming Third Edition phần 3 docx
... the shell sees the first single quote, it ignores any otherwise special characters that follow until
it sees the closing quote.
$ grep 'Susan Goldberg' phonebook
Susan Goldberg 201 -55 5-7776
$
In ... into
detail on the quoting mechanisms in the shell.
Variables
Like virtually all programming languages, the shell allows you to store values into variables. A shell
variabl...
Unix Shell Programming Third Edition phần 6 ppt
... $number2
done
$ cat data
1234 7960
59 3 -59 5
3 95 304
3234 999
-394 -493
$ align data
1234 7960
59 3 -59 5
3 95 304
3234 999
-394 -493
$
In Chapters 12, 14, and 15 you'll see more uses for ... one of the above (1-3): 2
Enter name to be added: Teri Zak
Enter number: 201 -55 5-6000
$ rolo Teri
Teri Zak 201 -55 5-6000
$
rolo, lu, and add seem to be working fine. rem should also b...
Unix Shell Programming Third Edition phần 7 pdf
... 2
and then execute a subshell, which in turn executes other shell programs as subshells. If an interrupt
signal is then generated, it will have no effect on the shells or subshells that are executing ... Appendix A,
" ;Shell Summary."
Table 13.1. Commonly Used Signal Numbers
Signal
Generated for
0
Exit from the shell
1
Hangup
2
Interrupt (for example, Delete, Ctrl+c key)
15
So...
Unix Shell Programming Third Edition phần 8 doc
... start up a new
shell, you get the shell you want and not an older Bourne shell.
Functions
Bash and the Korn shell both have function features not available in the POSIX standard shell.
Local ... you to interactive features of
the shell and two shells that have some nice features not found in the POSIX standard shell.
Getting the Right Shell
Most shells follow a conventi...
Unix Shell Programming Third Edition phần 9 ppt
... command-line option, or after set –o posix is executed.
Table 15. 4. POSIX Shell, Korn Shell, and Bash Compatibility
POSIX Shell
Korn Shell
Bash
ENV file
X
X
POS
vi line edit mode
X
X
X
emacs ... Variables
There are three different "types" of parameters: shell variables, special parameters, and positional
parameters.
Shell Variables
A shell variable name must sta...