How to filter only comments while reading a file including line break characters.
[Solved]
How do I filter only comments and still keep Line breaks at the end of the line!?
This is one of the common tasks we all do,, How can we do this in a right way..!?
I try to ignore empty lines and commented lines using following approach.
test.sh
input.txt
$> test.sh
From above result, I want to see ..
First Line --> Ignore only comment part ,, while still keeping line break.
Third line --> Trim prefix space characters. ( This one is nice to have but not critical)
Second approach I have seen is to use sed. But it removes line breaks at the end of each line,, thus presenting a different challenge of loosing line breaks. I really never understood how to use this..
Let us see what characters make for spaces according to standards body?
Please try test the above code, requirements are in input.txt file.
I still get the space prefix chracter[s] on third line.. I used a TAB + spacebar on third line in my input.. Again trimming should work for any combination of space characters.
Hello All,
I want to print data in between two lines in a file sample.txt through more or cat command on the screen. For that I am using below sed command to give the BEGIN and END text.
Content of sample.txt
server01:~ # cat /proc/mdstat
Hello this is a text message 1
Hello this is a... (5 Replies)
I searched and found "echo -n" and "printf" are solution for this, but they are not
here:
$ echo "hello" >> test
$ cat test
hello
$ echo -n "world" >> test
$ cat test
hello
world
$ echo -n " seriously?" >> test
$ cat test
hello
world seriously?
This is not successful... (15 Replies)
I cannot seem to get this to work..
I have a file which has about 100 lines, and there is no end of line (line break \n) at the end of each line, and this is causing problem when i paste them into an application.
the file looks like this
this is a test
that is a test
balblblablblhblbha... (1 Reply)
So, I want to read line-by-line a text file with unknown number of files....
So:
a=1
b=1
while ; do
b=`sed -n '$ap' test`
a=`expr $a + 1`
$here do something with b etc
done
the problem is that sed does not seem to recognise the $a, even when trying
sed -n ' $a p'
So, I cannot read... (3 Replies)
Hi,
I want to filter record from a file if the records in the second column matches the data in another file. I tried the below awk command but it filters the records in the filter file. I want the opposite, to include only the records in the filter file.
I tried this:
awk -F'|'... (8 Replies)
Hello.
I am a french newbie in unix shell scripting (sorry if my english speaking is wrong).
I have a file with path and filenames in it. I want to limit the number of characters on each line and break the line if necessary. But the "break" should occur after a slash caracter "/".
Example of... (9 Replies)
Hi All,
I have a script that reads a file and echo it back to std out.
Test.txt
1aaaaaaaaaaa .
The script is ReadLine.sh
#!/bin/ksh
cat $1 | while read file
do
echo $file
done
I invoke the script as ReadLine.sh Test.txt
The output that I get is (1 Reply)
Hi,
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/oracle/admin/orcl/bdump/:atlas:trc:N
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