Questions tagged [assignment]
The assignment tag has no usage guidance.
40
questions
-1
votes
1
answer
255
views
Zsh string variable containing multi words must be assigned to an array
How to have Zsh string variable containing multi words separated by space be assigned to an array so that each word is the array element
s='run help behind me'
a=($s)
m=${a[0]}
n=${a[1]}
print "m=...
user571604
1
vote
1
answer
86
views
How to iterate over a directory for files without including sub-directories in Bash
I need to parse through a directory that contains files and subdirectories however I am unable to use the find command. The for loop is supposed to go through each file and compare it to another ...
- 11
9
votes
2
answers
770
views
In POSIX scripting, is x=$y always equivalent to x="$y"?
Are
x=$y
and
x="$y"
always equivalent? Didn't know how to search for this. So far, I've always been using x="$y" to be "on the safe side". But I used x=$1 at one point ...
- 3,142
-1
votes
1
answer
51
views
Grouping commands of if...then statement, including assignation of variable for shell/bash in a single line
I know the existence of while-do-done. Alternatively, I know that I can use for-do-done. But, I was trying to test manually using if-then-else.
I would to like to execute a command, but doing a shift ...
- 365
0
votes
1
answer
430
views
Assigning $* in shell script from args array
After iterating thru the shell arguments and filtering out unwanted arguments into an array, I want to assign the array back to $*.
For example, in the below script, I want to remove the arguments -f ...
- 15
1
vote
0
answers
1k
views
Completely disable NetworkManager from using DHCP client?
I am using RHEL 7.9.
This version of RHEL I use nmcli and nmtui to configure network connections.
Problem:
NetworkManager service appears to be filling up journalctl logs with the following output
Apr ...
- 621
7
votes
2
answers
568
views
why is zsh not expanding this glob defined inside a function '(:a)'
The second line of the script only works if I trigger glob expansion by executing echo. I can't understand why. Here's the command and it's execution to give some context.
Function definition:
~/ cat ~...
- 73
0
votes
2
answers
2k
views
How to move home using relative path [closed]
The question is "Your current directory is cambridge. Move to your home directory using a relative pathname (don't use cd by itself for this move)" but I cannot for the life of me figure it ...
- 3
0
votes
0
answers
88
views
Variable assignment echo $VAR in subshell is a good method or not? (Nested bash functions)
I'm not a BASH programmer and whenever I have to create scripts it's a lottery for me, so apologies if my script looks too redudant or written by a newbie.
As a foreword I have many screen snapshots ...
- 21
0
votes
1
answer
413
views
one line definition of a variable conditional on the output of a logical test
In bash programming I've always defined conditional variables in the following long hand way
dog=1
if [[ $dog -eq 1 ]] ; then
cow=1
else
cow=0
fi
This is obviously incredibly inefficient. In ...
- 453
8
votes
2
answers
4k
views
changing IFS temporarily before a for loop [duplicate]
I know that the SHELL allows variable assignment to take place immediately before a command, such that IFS=":" read a b c d <<< "$here_string" works...
What I was ...
- 848
1
vote
1
answer
748
views
Result of a command is not assigned to a variable
I am pretty unexperienced (to put it mildly) when it comes to BASH and Shell scripting, so bear with me:
$ toda=$(date) | echo $toda
gives me: Fr 29 Mai 2020 15:25:19 CEST. So far so good.
datediff ...
- 13
0
votes
3
answers
6k
views
Assign to a variable in a bash script
I have the following script and I try to create an empty text file. I tried touch and I tried echo -n > - they both fail.
#!/bin/bash
set filename_result="contents"
echo "filename=$...
- 153
4
votes
1
answer
107
views
$-expansions not performed as expected when following a redirection
It seems that bash and zsh will perform the variable and arithmetic expansions in a child process when
a) they're following a redirection operator like <, >, >> or <<<.
b) the ...
user313992
9
votes
5
answers
10k
views
Assign the same string to multiple variables
I want to assign the string contained in $value to multiple BASH variables.
Actually the example I gave before (var1=var2=...=$value) was not reflecting exactly what I wanted.
So far, I found this but ...
- 2,209