दस्तावेज़ीकरणएकल कोट
If we need to suppress सब expansions, we use एकल कोट. Here is a comparison of un- quoted, double quotes, and single quotes:
[मुझे@लिनक्सबॉक्स ~]$ echo text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER
text /home/me/ls-output.txt a b foo 4 me
[मुझे@लिनक्सबॉक्स ~]$ echo "text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER"
text ~/*.txt {a,b} foo 4 me
[मुझे@लिनक्सबॉक्स ~]$ echo 'text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER'
text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER
[मुझे@लिनक्सबॉक्स ~]$ echo text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER
text /home/me/ls-output.txt a b foo 4 me
[मुझे@लिनक्सबॉक्स ~]$ echo "text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER"
text ~/*.txt {a,b} foo 4 me
[मुझे@लिनक्सबॉक्स ~]$ echo 'text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER'
text ~/*.txt {a,b} $(echo foo) $((2+2)) $USER
As we can see, with each succeeding level of quoting, more and more of the expansions are suppressed.