All Questions
24 questions
1
vote
1
answer
46
views
How To Use Quotes In Variable In Bash [duplicate]
I need to assign a command to a variable and execute it with variable in linux bash. The command executes fine from command line but not from the variable because of multiple quotes. I hope backslash ...
- 113
0
votes
1
answer
40
views
Does Bash have an option to diagnose "expanded to empty value" variables? [duplicate]
Does Bash have an option to diagnose (and optionally abort execution) "expanded to empty value" variables?
Example (hypothetical):
$ bash -c 'echo $x' --xxx
bash: line 1: variable 'x' ...
- 593
7
votes
1
answer
1k
views
printf - store formatted string output in a variable
Instead of the following
printf '%s\t%s\t%s\t%s\n' 'index' 'podcast' 'website' 'YouTube'
I want to store the printf output in a Results variable, how can I do this?
- 2,146
0
votes
2
answers
172
views
how to replace a string with a variable?
I am trying to write a script containing a loop that enters a series of directories containing the same file, to replace a text string in a file with a variable that matches the directory's name.
The ...
5
votes
2
answers
478
views
Issue expanding variable with multiple wildcards in bash shell script with mv / rename
I wrote a bash shell script for Linux to move files in a static folder according to parameters specified in a data file.
I've reduced that script to a minimal reproducible example to demonstrate an ...
0
votes
3
answers
107
views
How to expand variable inside single or double qoutes
I have 2 systems and they have the same directory strcuture. I want to execute a couple of commands on local system and the same on remote system.
I use the wildcards so when I have a new version of ...
- 998
0
votes
2
answers
1k
views
Export a value from input variable
I need to export the values from input. However it's failing in bash.
Here's the code -
echo "Please enter HOST :"
read RDSHOST && export RDSHOST
And my value is something like - ...
- 5
0
votes
0
answers
503
views
how to expand a variable with backslash in bash script [duplicate]
i read a line from another file that contains a backslash, and i want to echo this line without expanding the backslash :
script.sh :
#!/bin/bash
while read line
do
echo "$line"
done &...
- 121
0
votes
1
answer
1k
views
Nested variables that rely on one another
I'm trying to automate WireGuard on my OpenWrt router but I'm having some issues with nested variables when it comes to creating my configuration file. Below are the variables I have set:
export LAN=&...
- 67
2
votes
2
answers
2k
views
sed with external script file - How to apply shell variables?
Directly on the command line, this works:
$sed "s/a/X/;s/X/&a&/" file
and so does using shell variables:
$varin=a ; varout=X ; sed "s/$varin/$varout/;s/$varout/&$varin&/...
- 13.9k
0
votes
1
answer
566
views
Variable in Bash Alias not working as intended [duplicate]
The alias doesn't work properly until running source ~/.bashrc or source ~/.bash_aliases ONLY AFTER running the alias once first. Is there a magical way to get the $todaydir string to be replaced ...
- 11
1
vote
1
answer
565
views
Expand shell variable while editing command line
If I write ls bla.* at the prompt and then I press = while the cursor is still on the bla.* part of the command line, the list of files matching bla.* is printed. If I press *, that word is ...
- 2,179
0
votes
1
answer
830
views
User input to search bash array
folks--
I'm getting kinda stuck, here. I have a small script that will be incorporated into a larger script. This small piece is supposed to take a user input, and compare it to a list of stored ...
- 35
-2
votes
2
answers
4k
views
How to execute a command that has many nested single and double quotes with a quoted variable in bash
Here is my simple script
#!/bin/sh
thefile=/home/ark/arkserver/ShooterGame/Saved/SaveIsland/1288804998.arktribe
while inotifywait "${thefile}" ; do
a=\"`strings ${thefile} | tail -n 5 | head -n ...
- 19
13
votes
4
answers
17k
views
Is it possible to print the content of the content of a variable with shell script? (indirect referencing)
Let's suppose I've declared the following variables:
$ var='$test'
$ test="my string"
If I print their contents I see the following:
$ echo $var
$test
$ echo $test
my string
I'd like to find a way ...
- 2,696