Read your shell's man page on command substitution.
Read the awk man page. It's a very powerful pattern scanning and text processing language.
Your replies saved lot of time in learning shell script and made life easier
* I downloaded Fedora 19
* I installed it in my laptop
* I created that simple shell script and executed to know the pointsb value with some dummy values of other variables
* I created another shell script without awk
The logic is completely right in the above code apart from the system mistakes. I am sure i am not going to write any shell script. I just wanted to learn it. So when i read a script, i could understand the flow.
I am beginner in awk
awk 'BEGIN{for(i=1;(getline<"opnoise")>0;i++) arr=$1}{print arr}'
In the above script, opnoise is a file, I am reading it into an array and then printing the value corresponding to index 20. Well this is not my real objective, but I have posted this example to describe... (1 Reply)
Hi Experts,
The question may look very silly by seeing the title, but please have a look at it clearly.
I have a text file where the first 5 columns in each row were supposed to be attributes of a sample(like sample name, number, status etc) and the next 25 columns are parameters on which... (3 Replies)
Dear People,
My query is:
have a file, which looks likes this:
10 20 30 40 50
1 2 3 4 5
100 200 300 400 500
what i need is: "PRINT EACH LINE TO AN UNIQUE FILE"
desired output:
file 1
10 20 30 40 50
file 2
1 2 3 4 5 (3 Replies)
Hi!
I have a strange behaviour from sed and awk, but I'm not sure, if I'm doing something wrong:
I have a list of words, where I want to add the following string at the end of each line:
\;\;\;\;0\;1
I try like this:
$ cat myfile | awk '{if ( $0 != "" ) print $0"\;\;\;\;0\;1"}'
Result:... (5 Replies)
I found that
echo "aaa" | awk '{print ",\\";}'
works, and it will give "\".
but
ddd=`echo "aaa" | awk '{print ",\\";}'`; echo $ddd
will not work.
Could anyone tell me why? thank you. (8 Replies)
Hi,
I have written below script to begin if the line has n
#!/bin/ksh
/usr/xpg4/bin/awk {/ n / 'BEGIN {X = "01"; X = "02"; X = "03"; X = "04";
X = "05"; X = "06"; X = "07"; X = "08";
X ="09"; X = "10"; X = "11"; X = "12"; };}
NR > 1 {print $1 "\t" $5 "," X "," $6 " " $7}'} input.txt |... (9 Replies)
My code fails to do anything if I've BEGIN block in it:
Run the awk script as:
awk -f ~/bin/sum_dupli_gene.awk make_gene_probe.txt
#!/usr/bin/awk -f
BEGIN {
print ARGV
#--loads of stuff
}
END{
#more stuff
} (14 Replies)
Example:
I have files in below format
file 1:
zxc,133,joe@example.com
cst,222,xyz@example1.com
File 2 Contains:
hxd
hcd
jws
zxc
cst
File 1 has 50000 lines and file 2 has around 30000 lines :
Expected Output has to be :
hxd
hcd
jws (5 Replies)
Discussion started by: TestPractice
5 Replies
LEARN ABOUT X11R4
exit
exit(1) User Commands exit(1)NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps
SYNOPSIS
sh
exit [n]
return [n]
csh
exit [ ( expr )]
goto label
ksh
*exit [n]
*return [n]
DESCRIPTION
sh
exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of
the last command executed (an EOF will also cause the shell to exit.)
return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe-
cuted.
csh
exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the
expression expr.
The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches
for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to
jump to a label that occurs between a while or for built-in command and its corresponding end.
ksh
exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8
bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing
a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit
except for a shell which has the ignoreeof option (See set below) turned on.
return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the
least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return
is invoked while not in a function or a '.' script, then it is the same as an exit.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO break(1), csh(1), ksh(1), sh(1), attributes(5)SunOS 5.10 15 Apr 1994 exit(1)