The script I am writing must be able to run several commands (tar, gzip etc) on filenames that are supplied by variables. I am unsure as to what syntax is required/ideal when referencing variables in filenames. The following is a sample command that I would like the script to execute:
Almost there, but you'd need a $ before {filename} so that the variable's value is evaluated, like you've done with the DATEyear and DATEmonth variables. Apart from that, spot on.
Quote:
Originally Posted by mharley
Also, is there a way to verify where one or more files bearing a variation on a filename exist within the directory? For example, all files under filename.*? I have been using
but I've been told that this statement is intended more for verifying the existance of a single file, not a range of files.
This really depends on exactly what you're looking for... say if I had some files in my current directory named file1, file2, file3, filen, etc.... you could check how many files match a certain pattern (i.e. which contain the string "file") using find and piping through wc.... Then check that value...
Cheers
ZB
Hi,
I'm back!
Ok, I'm trying to use a variable with a value of a unix command.
So when I try a=`ls`, then echo $a I get the correct answer.
But when I try it with a pipe:
a=`ls | wc -c`, then echo $a I get:
filename: a: command not found
I've tried so many ways I presumme it's the pipe... (1 Reply)
I have this idea.
I have a variable for the start of someones log in time,
(start=`who am i | cut -c30-34`)
and a variable for the log out time or present time,
(end=`date | cut -c12-16`)
but how do I go about subtracting them to get the total log in time.
I've tried adding a another variable... (2 Replies)
A good place to start is simple variable passing....
Passing variables from one script to another
The next level is passing a variable into a more complex command such as using a variable in a sed command. There are some simple quoting techniques that are very general. These are mentioned... (0 Replies)
Hi there, I need to be able to put the hostid of my box into a file (replacing the text "enter_hostid_here" so i tried
sed -e 's/enter_hostid_here/`hostid`/g' inputfile > outputfile
but it takes the `hostid` literally as text .....how can I get this info into the file (ideally in a single... (2 Replies)
Can I use my own variables within awk and sed for example:
I've written a while loop with a counter $i and I want to use the value of $i within sed and awk to edit certain lines of text within a data file.
I want to use :
sed '1s/$/texthere/g' data.csv
Like this:
sed '$is/$/$age/g' data.csv... (5 Replies)
This is going to be part of a longer script with more features, but I have boiled it down to the one thing that is presently stumping me. The goal is a script which checks for updates to web pages that can be run as a cron job. The script reads (from a tab-delim file) a URL, an MD5 digest, and an... (1 Reply)
Hi there
I found the Command to send commands to other servers like:
sv01> ssh user@sv02 'ps -ef'
But I cant use Variables from a script i want to execute on another server like:
sv01> ssh user@sv02 'cd $SCRIPTHOME'
although the variable is set on sv01.
How can I run commands on sv02 with... (2 Replies)
Hello I am hoping you may help.
I am not sure how to go about this exactly, I know the tools but not sure how to make them work together.
I have two SED commands that I would like to run in a shell script. I would like to take
the manual input of a user (types in when prompted) to be used... (4 Replies)
Hi All,
Seeking for your assistance on how to put in variables all the commands in /bin
config files: /home/test/config_file/config.cfg
cat /home/test/config_file/config.cfg
ECHO=/bin/echo
LS=/bin/lsMain script
cat test.sh
source=/home/test/config_file/config.cfg
ECHO=$ECHO
LS=$LS#i... (3 Replies)