All Questions
10 questions
-1
votes
1
answer
451
views
How to store a command output as a variable while erroring out if it fails?
I am trying to do an if statement based on a variable that is command, for instance:
ssh_location=$(which ssh)
My problem is that, I want to store this only if it exists on the system so I can do ...
0
votes
0
answers
115
views
How to put an $ variable inside the printing of a command variable? [duplicate]
Source part:
if [ $(jq -r '.patch_at' update.json) -ge "4" ]; then
recentlycheckedat=$(echo '('`date +"%s.%N"` ' * 1000000)/1' | bc)
contents="$(jq '....
0
votes
2
answers
3k
views
How can i store commands as a variables and execute them randomly in bash?
How can i store commands as a variables and execute them randomly in bash?
command1="
convert -size 2000x1000 xc:none -gravity center \
-stroke yellow -pointsize 50 -font Courier-BoldOblique -...
- 304
0
votes
2
answers
2k
views
Remove unwanted character from a variable
I've seen a few of these questions, and a few answers, but they only tells me how to echo the results to the screen, and often only refers to one character. I need to remove the chars ',
and keep ...
- 417
-1
votes
1
answer
72
views
Bash: I have a variable in bash script; [duplicate]
I have a variable in bash script dirs= "4"; I want to get this number from another file so I am using a command dirs= sed -n '1p' < test.txt; It gets me the number, I see it in the terminal. But ...
- 15
0
votes
0
answers
25
views
Add locale in variable for command [duplicate]
I'm trying to call a command from a variable in a script with a specific locale, example :
$ myYTDL="LANG=C.UTF-8 youtube-dl --get-filename"
but each time I try and call it in the script, I get :
$ $...
- 2,401
0
votes
1
answer
241
views
bash variable does not keep command result
Problem:
Storage of the command result in variable portcheck does not work as expected.
My script contains this method
#!/bin/bash
...
status() {
portcheck=$(nc -z -v -w5 localhost 8443)
...
- 103
1
vote
1
answer
245
views
Bash - Catch input for a substituted command stored in variable
How would I be able to catch the input for a substituted command stored in a variable?
Example:
How would I be able to catch the input for the following command?
bar_foo=$(openssl passwd -1 -salt &...
2
votes
1
answer
2k
views
Run a command stored in a variable to echo into a file
How can I get the stored command to work for the following scenario:
CMD='echo "test" >> test.txt'
$CMD
It will work for other scenarios like:
CMD='mkdir test'
$CMD
1
vote
1
answer
2k
views
Get two values from command output in a bash script
I have a bashscript, which executes a command and calculates a pair of values, which output can look like this.
a,b (10.0000000000, 10.0000000000) -> volt (2088133.7088034691, -222653.3238934391)
...
- 67