Hi,
variable1="This is a car"
Now I want to replace the content of variable1, "car" to "dog". Is there any simple command I can use.
Thanks.
Joseph (4 Replies)
I got a sample BASH script like this :
$ cat test
MYVAR=$1
DUMMY1="This is tricky"
DUMMY2=24
echo $
$ ./test DUMMY1
./test: line 5: This is tricky: syntax error in expression (error token is "is tricky")
**I was expecting the output as "This is tricky", ah! but no luck
**But... (2 Replies)
Hello!
I'm having problems trying to extract the contents of a variable and placing it into a text file. Grateful for any help.
Been trying something along the lines of:
$variable > file.txt
or
`cat < $variable` > file.txt
As you can see I'm a newbie to this :D (2 Replies)
I want to address a variable content whose name is/matches the content of a given other variable.
i.e.
set name=´sam´
set ${name}_age=´27´
So, by typing: echo ${name}_age
I correctly obtain: sam_age
By typing: echo $sam_age
or echo ${sam_age}
I correctly obtain: 27
But how can I... (3 Replies)
I am having one string like
./usr1/Server/temp/app.env ./usr1/Server/temp/upp/app.env ./usr1/Server/ORIG_temp/app.env ./usr1/Server/ORIG_temp/upp/app.env ./usr1/Server/work_temp_40/app.env ./usr1/Server/work_temp_40/upp/app.env ./usr1/fd/app.env ./usr1/PurgeArchive/app.env ./usr1/bm/bin/app.env... (6 Replies)
For example, I have a simple text file
note:
this a note
a simple note
a very very simple notewhen I use this command,
temp=$(cat "note.txt")then I echo temp, the result is in one line.
echo $temp
note: this a note a simple note a very very simple noteMy variable doesn't have newline.
How... (7 Replies)
Hello all,
I do have a variable containing one line like this:
Waiting for job XXXXXX to start
I needed to get the 'XXXXXX' literal, so I did the following:
job_interno=`echo $log_exec | sed 's/.*Waiting for job \(*\).*/\1/' `
#other stuff
Now, my variable is have more... (5 Replies)
is this possible?
its kind of like incrementing the value of a number in a variable. but in this case, instead of the value of the variable being a number, it's just contents/strings/characters/alpha-numeric etc. NOT a number.
For instance:
VAR=Tommy
for all in $(blah blah)
do
... (2 Replies)
hi i just cant figure out how can i do this ls -lt > log.txt using $PWD
what i mean is how can i get the ls command content into a file using $PWD variable? :confused: (4 Replies)
Dear all,
I have a "SQL request" in a file: that request include different "host variable" and I would like to substitute the different "host variable" by their respective content before executing the request.
For example:
$ echo $SHELL
/bin/bash
$ cat dae2.txt
DELETE FROM ... (11 Replies)
Discussion started by: dae
11 Replies
LEARN ABOUT DEBIAN
envstore
ENVSTORE(1) BSD General Commands Manual ENVSTORE(1)NAME
envstore -- save and restore environment variables
SYNOPSIS
envstore command [args ...]
DESCRIPTION
envstore can save and restore environment variables, thus transferring them between different shells.
command must be one of
clear
Forget all stored variables
eval
Produce shell code for evaluation, restoring all saved variables
list
List saved variables in better readable format
save variable [value]
Save variable either with its current shell value or with value
rm variable
Remove variable from store
Note: Only the first character of command is checked, so envstore e instead of envstore eval, envstore c for envstore clear, etc., are also
valid.
ENVIRONMENT
ENVSTORE_FILE The file in which the environment parameters are stored, /tmp/envstore-EUID by default,
LIMITATIONS
Variable names or values must not contain null bytes or newlines.
Due to limitations imposed by most shells, it is not possible to save parameters containing more than one consecutive whitespace. envstore
will save and display them correctly, but unless you do IFS trickery, your shell will not be able to load them.
The current maximum length (in bytes) is 255 bytes for the variable name and 1023 bytes for its content.
AUTHOR
envstore was written by Daniel Friesel <derf@derf.homelinux.org>.
Original idea and script by Maximilian Gass <mxey@ghosthacking.net>.
SEE ALSO envify(1)BSD December 1, 2009 BSD