The first example is an example of a hard-coded file name, ie "file.txt".
The second example is an example of a file name kept in a variable that is usually set in the script.
Another example is:
"$1" is special, it means use the first argument passed to the shell script, so if you then ran the shell script, for example "./script foo.txt" then the output would be stored in foo.txt
Dear all,
Currently I writing a ksh script to perform some sql query. I already pipe results in a output file. But when I checked it, the output file is empty.
Below is part of the script that I wrote:
------------------------------------------------------------------------
function... (4 Replies)
Hi All,
I am checking for a empty input file to do some further action , but I am getting exit status 0 in both the cases , for empty and non empty file both.
The value of $? is coming 0 in if part also and else part too.
#!/bin/ksh
if ]; then
echo "data"
# exit 0
echo "$?"
else... (4 Replies)
I'm very new to writing scripts, so here is my problem...I have the following code already written (in perl)
system "rm file2";
open(FILE2, ">file2");
open(MYINPUTFILE, "file");
while(<MYINPUTFILE>) {
my($line) = $_;
chomp($line);
print file2 "$line\n";
print... (2 Replies)
I have a script (multirun.sh) which launches the program bsim_em.x or bsim_es.x depending on the value entered from the screen:
> multirun.sh 1 (executes bsim_em.x)
> multirun.sh 2 (executes bsim_es.x)
which, simplifying, I do with the following lines in the multirun.sh script:
if ... (3 Replies)
Hello, I am VERY new to shell scripting here, so please go easy. I have an assignment that requires creating a script using bash shell, outputting all command line arguments that are not empty ones such as " ", and showing total number of arguments. I know how to show the total with $# and all... (6 Replies)
Hi all,
i want to sent output to email and folder at same time. This is my code :
echo "Hello" | mailx -s "${SUBJECT}" "${email_add}" >> ${file}
I only can sent output to my email but cannot sent to my empty folder....can i know how to done it? (1 Reply)
Hi Guys,
My problem looks simple. I have a software-proprietary command (not linux) that provides an output, let's say 200 lines.
Unfortunately the dumb coders of the software did not include the option ">" or ">>" which allows to transfer output to a file, so I need a way to do that using some... (5 Replies)
The awk below runs, however the output file is 0 bytes. It is basically matching input files that are 21 - 259 records to a file of 11,137,660 records. Basically, what it does is use the input files of which there are 4 to search and match in a large 11,000,000 record file and output the... (4 Replies)
The below awk improved bu @MadeInGermany, works great as long as the input file has data in it in the below format:
input
chrX 25031028 25031925 chrX:25031028-25031925 ARX 631 18
chrX 25031028 25031925 chrX:25031028-25031925 ARX 632 14... (3 Replies)
I am working an some if then statements for a script.
I want to be able to check for alpha characters or empty out put then exit out.
if ]];
echo "Serial Number Invaild"
then exit 3;
How do I account if the output is empty or null in this in this statement.
Many thanks (6 Replies)
Discussion started by: andysensible
6 Replies
LEARN ABOUT DEBIAN
x2sys_merge
X2SYS_MERGE(1gmt) Generic Mapping Tools X2SYS_MERGE(1gmt)NAME
x2sys_merge - Merge an updated COEs tables
SYNOPSIS
x2sys_merge -Amain_COElist.d -Mnew_COElist.d
DESCRIPTION
x2sys_merge will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second
file should only contain updated COEs relatively to the first one. That is, it MUST NOT contain any new two tracks intersections (This
point is NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had
to recompute only the COEs between the edited files and the rest of the database.
-A Specify the file main_COElist.d with the main crossover error data base.
-M Specify the file new_COElist.d with the newly computed crossover error data base.
OPTIONS
No space between the option flag and the associated arguments.
EXAMPLES
To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try
x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt
SEE ALSO x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1)GMT 4.5.7 15 Jul 2011 X2SYS_MERGE(1gmt)