Questions tagged [quoting]
Strings are typically delimited by quotes, which raises the problem of dealing with strings that include quotes.
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"grep: Unmatched [" error when using regex
I'm trying to find a pattern similar to this:
tail -n 100000 gateway.log | grep -B10 -A10 'Nov 22 11:13:56 Received Packet from [10.50.98.68'
Where "11:13:56" could be any time.
This is what I came ...
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2
votes
3
answers
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Variable expansion inside parentheses and quotes
In the script below, I can't seem to make $var1 expand in the second statement. I've tried $var1, ${var1}, echo $var1 and '$var1'. It is inside a few sets of quotes and parentheses which I guess is ...
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vote
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answer
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How do I quote square brackets in Ansible variable value for regexp parameter?
I use the ansible.builtin.lineinfile module to modify a PHP-FPM pool configuration file. How should I quote the square brackets (annot.: or other special characters) in a value of a variable for the ...
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votes
2
answers
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Bash reads quotes inside a variable as text, not quotes? Is "Implicit quoting" a thing in Bash?
I've got a bash script that cleans up the mail queue periodically. For Reasons, we've elected to delete any email to @mms.att.net and other email2SMS gateways that are over 9 hours in the queue and ...
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28
votes
8
answers
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awk print apostrophe/single quote
Can't figure out how to escape everything while using awk.
I need to enclose each input string with with single quotes, e.g.
input
string1
string2
string3
output
'string1'
'string2'
'string3'
Been ...
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6
votes
1
answer
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views
How do I tell GNU Parallel to not quote the replacement string
GNU Parallel quotes replacement strings by default so that they are not expanded by the shell. But in certain cases you really want the replacement string to be interpreted by the shell.
E.g.
$ cat ...
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votes
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answers
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How to execute an arbitrary simple command over ssh without knowing the login shell of the remote user?
ssh has an annoying feature in that when you run:
ssh user@host cmd and "here's" "one arg"
Instead of running that cmd with its arguments on host, it concatenates that cmd and ...
- 554k
148
votes
11
answers
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What is the difference between $* and $@?
Consider the following code:
foo () {
echo $*
}
bar () {
echo $@
}
foo 1 2 3 4
bar 1 2 3 4
It outputs:
1 2 3 4
1 2 3 4
I am using Ksh88, but I am interested in other common ...
- 3,453
214
votes
6
answers
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How can I execute `date` inside of a crontab job?
I want to create a log file for a cron script that has the current hour in the log file name. This is the command I tried to use:
0 * * * * echo hello >> ~/cron-logs/hourly/test`date "+%d"`.log
...
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7
votes
2
answers
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How to render variables without quotes in bash script?
The following script:
$ cat runme01.sh
#!/bin/bash
A=myval
B=$A/{fix}
C=$A/fix
set -xT
echo $B
echo $C
prints the following if ran:
$ ./runme01.sh
+ echo 'myval/{fix}'
myval/{fix}
+ echo myval/...
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217
votes
3
answers
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$VAR vs ${VAR} and to quote or not to quote
I can write
VAR=$VAR1
VAR=${VAR1}
VAR="$VAR1"
VAR="${VAR1}"
the end result to me all seems about the same. Why should I write one or the other? are any of these not portable/POSIX?
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0
votes
1
answer
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views
Unable to resolve parameter inside json
I'm using a curl command inside a script (edm.ksh) to retrieve some data from an API, it requires a password in a JSON like {"password":"myPassword"}. Now, myPassword is not ...
- 339k
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votes
1
answer
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Bash variable quoting in a function
I've defined a short helper function in a bash script. For legibility, I'd like to replace the boilerplate headers with a variable declared outside the function.
I've tried quoting the declaration ...
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votes
4
answers
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Properly escaping output from pipe in xargs
Example:
% touch -- safe-name -name-with-dash-prefix "name with space" \
'name-with-double-quote"' "name-with-single-quote'" \
'name-with-backslash\'
xargs can't seem to handle double quotes:...
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votes
2
answers
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Echoing "!" inside a string does some weird things [duplicate]
If I type in this:
echo "Hello, World!"
I don't know the name of it, but it prompts me for the next line. You know the PS2 thing. Or if you type echo \ and press Enter.
Why?
Well I know ...
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