TL;DR A single argument must be shorter than MAX_ARG_STRLEN. Analysis According to this link: And as additional limit since 2.6.23, one argument must not be longer than MAX_ARG_STRLEN (131072). This might become relevant if you generate a long call like “sh -c ‘generated with long arguments’”. This is exactly the “problem” identified by the OP. … Read more
One way using GNU awk and FPAT awk ‘BEGIN { FPAT = “([^, ]+)|(\”[^\”]+\”)” } { sum+=$3 } END { print sum }’ file.txt Result: 192
Looks like try: # py3 from shlex import quote except ImportError: # py2 from pipes import quote quote(“hello stack overflow’s quite cool”) >>> ‘”hello stack overflow\’s quite cool”‘ gets me far enough.
Use ssh deploy@hera ‘kill -9 `ps -ef | grep MapReduceNode | grep -v “grep” | awk -F ” ” ‘”‘”‘{print $2}'”‘”‘ | head -n 1`’ Explanation: ssh deploy@hera ‘kill -9 `ps -ef | grep MapReduceNode | grep -v “grep” | awk -F ” ” ‘”‘”‘{print $2}'”‘”‘ | head -n 1`’ > 1 <>2<> 3 <>4<> … Read more
Use quotes: cd “new folder” or escape the space: cd new\ folder (That being said, cd does not open a file but changes the working directory.)
I believe this notion comes from Lisp languages. Program written in Lisp consists of series of lists of lists of lists etc, like this: (defn f [x y] (+ x y)) Because of such uniformity it is possible to represent and manipulate such code as data, so the sequence of characters above is interpreted as … Read more
Why When the string is expanded, it is split into words, but it is not re-evaluated to find special characters such as quotes or dollar signs or … This is the way the shell has ‘always’ behaved, since the Bourne shell back in 1978 or thereabouts. Fix In bash, use an array to hold the … Read more
You need to escape the backtick, but also escape the backslash: $ touch 1\` $ /bin/sh -c “ls 1\\\`” 1` The reason you have to escape it “twice” is because you’re entering this command in an environment (such as a shell script) that interprets the double-quoted string once. It then gets interpreted again by the … Read more
The warnings about foregoing enclosures are valid, but you’ve said they don’t apply to your use-case. I’m wondering why you can’t just use something like this? <?php $fields = array( “field 1″,”field 2″,”field3hasNoSpaces” ); fputs(STDOUT, implode(‘,’, $fields).”\n”);
(Compiling an answer from comments, the know-how is by melpomene and AlexP.) What is that ” after sed -i? -i means in-place, that is, edit in the file directly. -i ” means edit in place a file whose name is the empty string. Since there probably is no file whose name is the empty string, … Read more