Check variable Post: 302853563

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If I have a variable $X, how do I check it is a number? Many thanks.

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Check the value of a string variable

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Check the value of a variable

#!/bin/sh echo "Running Script to capture ORACLE Erros" # Change Directory to the actual logs path cd /home/nv8510/lognew err_var=`grep -in "ORA-" *` if then echo "THESE ARE THE ORACLE ERROR OCCURED" echo "$err_var" echo...

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Check if a variable is having value

I have a script /root/asas with following contents. #!/bin/bash ha=`cat /etc/passwd | grep sandra` if ; then echo "Sandra is in /etc/passwd" echo "variable ha is $ha" else echo "Sandra is NOT in /etc/passwd" echo "variable ha is $ha" fi What...

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How to check whether a variable is empty or contains some value?

hi, i want to check whether a a variable contains some value or is empty in a shell script. so if the variable contains some value i want to do some job and if the variable doesnt contain any value then i need to skip that job. here is a sample script read_filenames.sh contains ...

LEARN ABOUT MINIX

tget

TGET(1) 						      General Commands Manual							   TGET(1)

NAME

       tget - get termcap values

SYNOPSIS

       tget [-flag id] [-num id] [-str id] [-goto col line] [[-echo] string]

DESCRIPTION

       Tget  allows  shell  scripts access to the termcap(3) functions.  Flags, numbers and strings can be queried from the termcap database under
       the entry denoted by the environment variable $TERM.

OPTIONS

       -flag id
	      Set the exit status to zero if the flag id is set.  All other options except -echo set the exit status to id being available or not.
	      The last option sets the final exit code.

       -num id
	      Print the value of the numeric variable id.

       -str id
	      Print the value of the string variable id.

       -goto col line
	      Generates instructions to go to the given column and line if the cm capability exists.

       -echo string
	      Prints string.  Any other argument that does not start with a dash is also printed.

EXAMPLE

       Try this: tget -str so 'Reverse Video' -str se

ENVIRONMENT

       TERM	      Terminal type.

       TERMCAP	      Path to the termcap database, by default /etc/termcap:/usr/etc/termcap.

SEE ALSO

       termcap(3).

DIAGNOSTICS

       Tget will fail immediately with a descriptive message if the termcap entry can't be found.

AUTHOR

       Kees J. Bot (kjb@cs.vu.nl)

																	   TGET(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Check if variable is a number

Discussion started by: handak9

2. Shell Programming and Scripting

check for NULL variable

Discussion started by: esham

3. Shell Programming and Scripting

How to check parameter variable?

Discussion started by: negixx

4. Shell Programming and Scripting

How to check if a variable contains a .

Discussion started by: gekkos