All Questions
210
questions
0
votes
0
answers
45
views
escape in double and single quotation [duplicate]
I am confusing why bash can escape "..." but can't escape '...'? Can some one give me a hint? Thanks
test@test:~$ echo "He said, \"Hello world\""
He said, "Hello ...
- 53
2
votes
1
answer
2k
views
pass long html string as argument to bash script (Filename too long)
I am passing an html string as an input to a bash script:
Script.py
def bash(commandStr):
subprocess.Popen(commandStr, shell=True, executable="/bin/bash")
def sendmail(subject, to, ...
- 123
0
votes
2
answers
236
views
How do I convert this script into an alias (MacOS, ZSH) [duplicate]
This script works fine when directly typed into the console:
N | find . -type f -iname "*.aac" -exec bash -c 'FILE="$1"; ffmpeg -i "${FILE}" -acodec libmp3lame "${...
- 107
1
vote
2
answers
4k
views
Bash: How do I quote shell arguments with spaces inside a variable containing multiple arguments without using an array? [duplicate]
In Bash, is it possible to pass a variable with a properly-quoted list of options to a command and not have it split on whitespace inside quotes? IOW, this script:
MYCONFIG="--hi FOO=bar 'X=ABC ...
- 127
3
votes
2
answers
280
views
Why does the command echo `echo \\\\\\\z` in bash script print \\z instead of \\\z?
The command
echo `echo \\\\\\\z`
is from this book , I don’t understand why it prints
\\z
when it get executed via the bash script.
I think it should print
\\\z
- 31
0
votes
2
answers
476
views
Pass qouted filename with spaces in a bash variable [duplicate]
In a bash shell, consider this:
$ x="-name 'foo bar'"
$ find $x
find: paths must precede expression: `bar''
$ find -name 'foo bar'
./foo bar
What can I put in $x to make find $x behave like ...
- 21
5
votes
3
answers
5k
views
Escaping double quotes inside command substitution
I am attempting to write a simple bash parser. I am following the steps in this wiki. One of the assumptions I make is that I can do a pass over the entire input string and remove all single and ...
- 189
1
vote
1
answer
973
views
Command substitution inside double quotes
I am attempting to write a bash parser. Many resources have referred to this wiki
One area I am getting stuck is why the following would work
echo "$(echo "hi")" # output => ...
- 189
0
votes
1
answer
244
views
dash: How can I quote the arguments ala "${(q+@)@}" in zsh?
I want to quote the arguments in dash (or sh, or even bash if that's not possible). I can do that with "${(q+@)@}" in zsh, such that reval <sth> ... is the same as just typing in <...
- 1,620
0
votes
2
answers
232
views
How to expand variable within a single-quoted argument?
I am trying to perform the following without luck:
SORT_BY='-k3,3r -k2,2 -k1,1r'
awk 'NR<4{print $0;next}{print $0 | sort '"${SORT_BY}"' -t"~"}'
I have tried with all sorts of quotes, unquote, ...
- 285
0
votes
1
answer
309
views
Quoting a command line argument containing a variable that may have both single and double quotes in its expansion
After some unsuccesful attempts at quoting the command string correctly, I ended up using the below command to run the identify command on the .jpg files under the working directory, the names of ...
- 33
0
votes
2
answers
484
views
Quoting directory names in bash prompt
I want to quote the current directory in my prompt.
Eg, if I do:
mkdir $'new\nline'; cd $'new\nline'
I want my prompt to display $'new\nline', and NOT print a literal newline.
I'm seeing ...
- 31.2k
0
votes
1
answer
541
views
Why cat command redirect a new file get executed right away?
I want to generate a bash file that could be called later, like this
cat <<-SCRIPT >test-$$
#!/bin/bash
osType=$(grep -Po '^NAME="\K[^"]*' /etc/os-release)
if [ "$...
- 347
0
votes
1
answer
113
views
Make shell interpret operators enclosed in single-quotes [closed]
I have two commands built using the logical operator &&. The two commands are enclosed in single-quotes because they are to be passed as a command to root:
$ su -c 'sed -i '1i TEXT' file1.txt ...
- 1,116
6
votes
4
answers
6k
views
How to prevent command substitution on the command line?
I find that when writing text as input to another program, any command substitutions in double quotes within the intended text are interpreted and expanded by the shell
The links in the answer here ...
- 1,116