Hello,
I have a list of 'inputs' and i want to convert those on the second list named 'Desired Outputs', but i don't know how to do it?
Inputs Desired Outputs
1 2
94 4
276 8
369 10
464 12 ... (0 Replies)
Hi,
I'm a newbie to shell scripting and I have the following problem:
I need all spaces between two letters or a letter and a number exchanged for an underscore, but all spaces between a letter and other characters need to remain. Searching forums didn't help...
One example for clarity:
... (3 Replies)
I really don't know the meaning of these operators. Could someone explain the meanings so I can make my test for today?
<, <=, ==, !=, >=, >,
||, &&, ! ~ , !~
Thanks! (1 Reply)
Hello..
I have a text file. I want to remove all the blank spaces(except tab) from the file..
I tried using sed command as shown below
sed 's/ //g' file1
But the problem with the above command is that it also eliminates 'tab' which is between the columns..
For example if the contents... (7 Replies)
Hi everyone..
I'm trying to eliminate multiple whitespaces from a file..
I must make use of shell script to eliminate whitespaces..
Take a look at the sample file
1 int main()
2 {
3 int a,b;
4 printf("Enter the values of a and b");
5 scanf("%d%d",&a,&b);
6 if(a>b) ... (6 Replies)
Hi
Lets say I have two arrays:
VAR_1 = "File_A" "File_B" "File_C" "File_D"
VAR_2 = "File_A" "File_D"
Is there a simple command to get the difference of these list, i.e.
VAR_1_2 = "File_B" "File_C"
or do I have to write a script and loop through all elements and compare them one by one?
... (1 Reply)
Our university has upgraded its version of a computational chemistry program that our group uses quite regularly. In the past we have been able to extract frequency spectra from log files that are generated. Since the upgrade, the viewing program errors out. I've been able to trace down the changes... (16 Replies)
Discussion started by: wsuchem
16 Replies
LEARN ABOUT HPUX
test
test(1) General Commands Manual test(1)NAME
test - condition evaluation command
SYNOPSIS
expr
DESCRIPTION
The command evaluates the expression expr and, if its value is True, returns a zero (true) exit status; otherwise, a nonzero (false) exit
status is returned. also returns a nonzero exit status if there are no arguments. The following primitives are used to construct expr:
True if file exists and is readable.
True if file exists and is writable.
True if file exists and is executable.
True if file exists and is a regular file.
True if file exists and is a directory.
True if file exists and is a character special file.
True if file exists and is a block special file.
True if file exists and is a named pipe (fifo).
True if file exists and its set-user-ID bit is set.
True if file exists and its set-group-ID bit is set.
True if file exists and its sticky bit is set.
True if file exists and has a size greater than zero.
True if file exists and is a symbolic link.
True if the open file whose file descriptor number is
fildes (1 by default) is associated with a terminal device.
True if the length of string
s1 is zero.
True if the length of the string
s1 is non-zero.
True if strings
s1 and s2 are identical.
True if strings
s1 and s2 are not identical.
s1 True if s1 is not the null string.
True if the integers
n1 and n2 are algebraically equal. Any of the comparisons and can be used in place of
These primaries can be combined with the following operators:
Unary negation operator.
Binary AND operator.
Binary OR operator
has higher precedence than
Parentheses for grouping.
Note that all the operators and flags are separate arguments to Note also that parentheses are significant to the shell and therefore must
be escaped. All file test operators return success if the argument is a symbolic link that points to a file of the file type being tested.
is interpreted directly by the shell, and therefore does not exist as a separate executable program.
EXTERNAL INFLUENCES
International Code Set Support
Single byte and multibyte character code sets are supported.
EXAMPLES
Exit if there are not two or three arguments:
Create a new file containing the text string if the file does not already exist:
Wait for myfile to become non-readable:
WARNINGS
When the form of this command is used, the matching must be the final argument, and both must be separate arguments from the arguments they
enclose (white space delimiters required.
Parentheses and other special shell metacharacters intended to be handled by test must be escaped or quoted when invoking from a shell.
Avoid such problems when comparing strings by inserting a non-operator character at the beginning of both operands:
This approach does not work with numeric comparisons or the unary operators because it would affect the operand being checked.
AUTHOR
was developed by the University of California, Berkeley and HP.
SEE ALSO find(1), sh-posix(1), sh(1).
STANDARDS CONFORMANCE test(1)