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17 questions linked to/from What does ` (backquote/backtick) mean in commands?
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23 votes
2 answers
83k views

I'm using Ubuntu 16.04 with Bash and I tried to read in Wikipedia, in here and in here, but I failed to understand the meaning of "command substitution" in shell-scripting in general, and in Bash in ...
Arcticooling's user avatar
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7 votes
1 answer
46k views

What is the ` character's name and what is its significance outside of SE code formatting because I cannot get it to work? I'm familiar with its use in the Stack Exchange forums used to format code ...
1'''s user avatar
  • 357
4 votes
1 answer
10k views

In a bash shell (A), typing an ` (accent-grave) will start another shell prompt (B). The output of any command entered in B is a command for A. $ ` > whoami` -bash: Joe: command not found (If my ...
RolfBly's user avatar
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-1 votes
1 answer
51 views

Today I noticed if I run: ldd `which bash` I get the expected output. But when I run ldd 'which bash' I get error ./which bash: No such file or directory. So what is the difference between the two ...
OB7DEV's user avatar
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292 votes
6 answers
47k views

There are two syntaxes for command substitution: with dollar-parentheses and with backticks. Running top -p $(pidof init) and top -p `pidof init` gives the same output. Are these two ways of doing the ...
tshepang's user avatar
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51 votes
5 answers
91k views

I want to do a bash script that measures the launch time of a browser for that I am using an html which gets the time-stamp on-load in milliseconds using JavaScript. In the shell script just before i ...
Eduard Florinescu's user avatar
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56 votes
3 answers
116k views

I am trying out the command $ b=5; echo `$b`; -bash: 5: command not found but it does not print 5 as it is supposed to. What am I missing here? What does ` (backquote/backtick) mean in commands? ...
coolcric's user avatar
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18 votes
2 answers
19k views

We know that the backtick character is used for command substitution: chown `id -u` /mydir Which made me wonder: is the tick character ´ used for anything in the Linux shell? Note: incidentally, ...
dr_'s user avatar
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18 votes
2 answers
5k views

I am currently trying to make a script that creates bytes that will be piped as input to netcat. Here is the idea of the script: (perl -e "print \"$BYTES\x00\"; cat file; perl -e "print \"More ...
MykelXIII's user avatar
  • 429
5 votes
1 answer
5k views

I'm working in tcsh. How do I create an alias for: nc stop `nc list | awk '/Running/{print $1}'` I tried various variations of: alias ncstop "nc stop `nc list | awk '/Running/{print $1}'`" but none ...
galina korosov's user avatar
  • 53
0 votes
1 answer
4k views

I have a backup script for my server that mostly works. Only the the rsync commands throw an error in the log I can't find a solution to. Here's part of my script (I removed the working stuff): #!/...
adiuva's user avatar
  • 103
-1 votes
1 answer
2k views

I'm following along the book "Penetration Testing: A hands-on...." and have hit a road bump in executing this simple bash script. The script basically looks pings all 254 hosts on the designated ...
chlee218's user avatar
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1 vote
2 answers
1k views

I accidentally typed in cd ` into terminal today and terminal didstrange things. It put a "> " signed on the next line followed by my cursor like it wanted some input. No matter what I entered ...
yesennes's user avatar
  • 173
0 votes
1 answer
408 views

Is listing files with ls dangerous? If I run just ls command in a directory with unknown files, can something bad happen? Can you show me examples how running ls command is dangerous as stated in this ...
mhyynmmccs's user avatar
  • 11
0 votes
1 answer
186 views

What does ` in Linux means? The sign with tilde on keypad. Does it evaluates the expression?
Maddy25's user avatar
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