All Questions
169 questions
-1
votes
1
answer
78
views
Bash local nameref declaration does not work
I am trying to set a local variable in a function with nameref.
The script code is the following:
#!/usr/bin/bash
msg=hello
myparam=''
superfunc () {
productfile=$1
local -n refmyparam=$2
}
...
- 460
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 ...
5
votes
2
answers
938
views
Is it while loop or the pipe causing global variable behaving unexpectedly
Could please someone explain the (from my POV) strange behavior of the COUNTER variable in the following code?
#!/bin/bash
COUNTER=0
function increment {
((COUNTER++))
}
function report {
...
1
vote
2
answers
212
views
Redirect to a filename that will be a variable and contain a command substitution
I'm using nmap to scan a network and then create an XML file that contains the scanned information. I want that XML file to contain the date of the scan so that each file is unique and I can see the ...
- 13
0
votes
1
answer
55
views
Bash script variable syntax: with some commands it works, with others it does not [duplicate]
I do not understand the behaviour of this variable:
SSH_CONFIG_FILE="~/.ssh/config"
echo $SSH_CONFIG_FILE
ls -l $SSH_CONFIG_FILE
ls -l ~/.ssh/config
This is the output:
~/.ssh/config
ls: ...
- 653
1
vote
0
answers
360
views
Extract from a curl its dire failure message (if case of return code != 0), status code, output, and error message into four different variables
I need to extract from a curl emitted:
the bash error message coming with a non-zero ?$ return code, in case my command would direly fail
the http status code returned by the server contacted
the ...
- 2,313
1
vote
0
answers
139
views
Can you assign a default array to a variable by specifying its values explicitly?
I know that I can use an existing array as the default value for a variable that is potentially uninitialized via
default_values=(1 2 'value is a string')
array=("${array[@]-${default_values[@]}}&...
- 11
1
vote
1
answer
288
views
Script to select a PulseAudio sink from an ordered list and use its name as command input
I wish to write a bash script that will create a PulseAudio loopback device between an audio source and a bluetooth device.
(Context - skippable)
So far I have (the relevant part of) my script as:
...
- 1,132
0
votes
2
answers
247
views
How to get the Path difference and store it in a variable
Suppose I have two paths. Path1 which is static and path2 which is dynamic.
Example:
Path1= /tmp/folder/
Path2= /tmp/folder/dir1/dir1_2
Result:
Diff= /dir/dir1_2
I want to achieve as above example....
0
votes
2
answers
52
views
How to pass commands around?
I have this simple script, which does nothing more than:
check if an email matches a specific pattern
in that case, add a tag to a taglist
before quitting, print that taglist
set -e
lista_tag=()
...
0
votes
2
answers
176
views
Use a variable value only for x times
I am making a bash script where I need to run a command using a specific ID. But a single ID can be used only 10 times. After that the ID should change
For Example I have three IDs
ID=(abcd1
abcd2
...
- 378
0
votes
1
answer
48
views
How to use the full variable value by mentioning some part of it in command line
I want to create a script where I can just use a variable by mentioning some part of its string in arguments
for example :
#!/bin/bash
ipv4_5784_4679=1.1.1.1
ipv4_7838_7782_8987=2.2.2.2
echo "...
- 378
0
votes
1
answer
294
views
Can't access variable outside the function even it isn't local
I have simple bash script. My bash version is GNU bash, version 4.4.20(1)-release (x86_64-redhat-linux-gnu)
#!/bin/bash
func() {
nlvar="i'm not local variable"
local lvar="i'...
2
votes
1
answer
210
views
Setting the value of variable1 according to value of variable2
I have a bash script which is executed as below
./myscript.sh --tourney --port 22456 --matchid 5
I have a variable named matchteams. Now there are list of match teams which are according to the id. ...
- 378