[Solved] Problem bash if file exists then < do...> else <do...>
Hi !
I have a problem with an if/else statement in bash.
I want to check if the file exists before running a task (for example here, counting lines), and if not I need to create an empty output file
The problem is even if the condition is true (the file actually exists) it goes directly to the else part and create an empty file in any case.
Could someone explain me what is wrong with my syntax... !!!
Hello,
I wonder whether if we have a open file dialog as (in gtk+) in html. I know that a submit-type form (such as <input value="Add File" type="submit">) opens such dialog, but it -naturally- tries to submit the file chosen. I only want to find out the file name, not upload it.
Thanks! (0 Replies)
I'd like a bash script to simply check to see if any file/files are present in a source directory, and if so move it/them to a target directory.
I have this but it doesn't work:
#!/bin/bash
if
then
mv /source/* /target
fi
What is the right syntax? Thanks! (4 Replies)
Hello
I have srv RHEL5, file system UTDM (EMC DiskXtender Unix/Linux File System Manager 3.5 & EMC Centera).
it all works under the scheme: have disk is formatted with a file system UTDM, drive open network - NFS, it write data, then migrate the data in the repository - EMC Centera.
There are... (0 Replies)
basically im trying to make this work in a bash shell script without using if statements
if
then
echo testfile exists!
fi
what it does is check if the file exists or not
i have this line but its not working, it checks if the testfile exists if it doesnt it 2> to the dev null... (3 Replies)
hello. this is the code
#!/bin/sh
total1024=0
total2048=0
total8192=0
if ; then
if ; then
while read variable
do
if ; then
total1024=$(( $total1024 + 1 ))
fi
if ; then
total2048=$((... (4 Replies)
Hey all,
Here's my dilemma:
1. I'm a newbie at scripting!
2. I need to create a script that checks: If a file size is equal to zero, then stop the installation.
Is there a way to do this or am I wasting my time???
Thanx in advance! :b: (2 Replies)
Hi
#Testing for file existence
if ; then
echo 'SCHOOL data is available for processing'
else
echo 'SCHOOL DATA IS NOT AVAILABLE FOR PROCESSING'
:
i wrote a script, where it begins by checking if file exists or not.
If it exists, it truncates the database... (2 Replies)
Hi!
I wanted to simplify my bash prompt, so I edited my etc/bashrc file. I thought this was the file that would override any other env files. When I opened it, I saw that the way it was setup was not what my prompt looked like, although I forget exactly what was there. But i edited it the way I... (1 Reply)
Hi All,
I am facing a problem while checking for existence of file over ssh !
Basically, i want to ssh and check if file exists.. If file exists return 1. If file does not exits return 0 (or any value)
I am using the below code
file_avail=`ssh username@host "if ]; then exit 1;... (10 Replies)
OK So I Recently Bought A whatbox Seed-box Act!!:cool:
I am connected to whatbox via SSH!!!
Now i have downloaded a movie and renamed it to 2yify.mp4 (800MB):o
When I TYPE the command to split it which is:)
split -b 400m 2yify.mp4
It gets renamed into two parts with different names... (4 Replies)
Discussion started by: anime12345
4 Replies
LEARN ABOUT REDHAT
mktemp
MKTEMP(1) BSD General Commands Manual MKTEMP(1)NAME
mktemp -- make temporary file name (unique)
SYNOPSIS
mktemp [-d] [-q] [-u] template
DESCRIPTION
The mktemp utility takes the given file name template and overwrites a portion of it to create a file name. This file name is unique and
suitable for use by the application. The template may be any file name with at least 6 of 'Xs' appended to it, for example /tmp/temp.XXXXXX.
The trailing 'Xs' are replaced with the current process number and/or a unique letter combination. The number of unique file names mktemp
can return depends on the number of 'Xs' provided; six 'Xs' will result in mktemp testing roughly 26 ** 6 combinations.
If mktemp can successfully generate a unique file name, the file is created with mode 0600 (unless the -u flag is given) and the filename is
printed to standard output.
OPTIONS
The available options are as follows:
-d Make a directory instead of a file.
-q Fail silently if an error occurs. This is useful if a script does not want error output to go to standard error.
-u Operate in ``unsafe'' mode. The temp file will be unlinked before mktemp exits. This is slightly better than mktemp(3) but still
introduces a race condition. Use of this option is not encouraged.
RETURN VALUES
The mktemp utility exits with a value of 0 on success, and 1 on failure.
EXAMPLES
The following sh(1) fragment illustrates a simple use of mktemp where the script should quit if it cannot get a safe temporary file.
TMPFILE=`mktemp /tmp/$0.XXXXXX` || exit 1
echo "program output" >> $TMPFILE
In this case, we want the script to catch the error itself.
TMPFILE=`mktemp -q /tmp/$0.XXXXXX`
if [ $? -ne 0 ]; then
echo "$0: Can't create temp file, exiting..."
exit 1
fi
Note that one can also check to see that $TMPFILE is zero length instead of checking $?. This would allow the check to be done later one in
the script (since $? would get clobbered by the next shell command).
SEE ALSO mkstemp(3), mktemp(3)HISTORY
The mktemp utility appeared in OpenBSD.
BSD November, 20, 1996 BSD