check if return value is blank Post: 302382827

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1. UNIX for Dummies Questions & Answers

check for the first character to be blank

I'm having a problem when the first line or first character of a file is blank. I need to get rid of both of them when they occur but don't want to delete the line. Does anyone have any suggestions?

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awk: How to check if field is blank?

In awk, I'd like to check if a field is blank. And by blank I mean, the field could be "" or " " In other words, the field could either be empty, or be filled with spaces. Would the regex look like this? $5 ~ // { Action }? What other ways are there? Hmm.. in any case I think...

3. Shell Programming and Scripting

how to check weather file is blank or not?

Dear All I want to do following task. Kindly suggest. In my script every hour one file is genarated. say xyz.txt. Now if this file contain some data then i want to do task A and if file is blank then i want to do nothing. Kindly help me to do this. regards jaydeep

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[bash] Check if variable is set or blank

Hello guys. In my script, i have the following code: echo "The tarfile contains these directorys" tar -tf file.tar > tarlist.txt cat tarlist | awk -F/ '{print $1 "/" $2}' | nl echo "Enter path of the directory you want to extract or just press enter to extract everything: " read path...

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how to check the variable values is blank

HI , I have to check the values of variable is blank or not. exm : ###test test1 var=`cate filename | head -1 | cut -c1-3` I need to check the first three character of 1st line . if it is blank .then exit or we need to process . Thanks in advance .

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check for users blank passwords

Hello, I have an AIX 5.3 system. I want to check users to see whether there are users with blank passwords but i would prefer to do that without checking /etc/passwd or /etc/security/passwd files. Also while i was searching the web for a solution i noticed that many people refer to /etc/shadow...

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shell script to check blank line?

Can someone help to transform the below logic into a shell script, might be easy for some of you. I have a file with below text, I need if the line has the ":" and the above to it is not a blank line should print " <text>: is incorrect format" Apple: vitamin = A...

8. Shell Programming and Scripting

Request to check:remove entries with blank spaces

Hi I want to remove entries with blank spaces in my input file: 123 234 456 678 56789 345346456 589 3454 345456 3454566............................

9. Shell Programming and Scripting

How to check if the file is empty or has blank space.?

Hi, I am using KSH. I am trying to check if the output file is empty or not. I tried with ] but what i see is my file is empty but still manages to have a size of 1 instead of 0. But my file doesnot have anything its empty. I am not sure how to check this. can any one help?

10. Shell Programming and Scripting

To check Blank Lines, Blank Records and Junk Characters in a File

LEARN ABOUT OSF1

script

script(1)						      General Commands Manual							 script(1)

NAME

       script - Makes a transcript of terminal session

SYNOPSIS

       script [-a] [file]

       The script command makes a transcript of everything printed on your terminal.

OPTIONS

       Appends the transcript to file rather than writing it to file.

OPERANDS

       The name of an output file that will contain the transcript of the session.  If this parameter is omitted, the file typescript is written.

DESCRIPTION

       The transcript is written to file, or appended to file if the -a option is given.  If no file name is given, the transcript is saved in the
       file typescript.

       The script ends when the forked shell exits.

       This program is useful when you are using a CRT and want a hard-copy record of the dialog (for example, a technical writer might create	an
       example of a working session this way).

       If you specify the -a option and the file does not exist, it is created.

       If you do not specify the -a option and the file exists, it is replaced.

RESTRICTIONS

       The  script command requires a streams based terminal.  In single user mode, streams may not be enabled.  Under these circumstances, script
       will exit with no action.  If you are the superuser and need to run this command in single user mode, use the  following  special  instruc-
       tions.

   Enabling Streams
       If it is necessary to enable a streams environment in the single user mode, enter the command /sbin/init.d/streams.  This command is avail-
       able to the superuser only.

SEE ALSO

       Commands:  autopush(8), cat(1), echo(1), strsetup(8), tee(1)

       System Administration

																	 script(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

check for the first character to be blank

Discussion started by: anthreedhr

2. Shell Programming and Scripting

awk: How to check if field is blank?

Discussion started by: yongho

3. Shell Programming and Scripting

how to check weather file is blank or not?

Discussion started by: jaydeep_sadaria

4. Shell Programming and Scripting

[bash] Check if variable is set or blank

Discussion started by: noratx