Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] ! (exclamation point) logical comparison operator number comparison operator != (is not equal) symbol != operator 2nd # run-parts lines (/etc/crontab files) #! (shebang lines) 2nd $# built-in variable $* built-in variable $0 built-in variable $? built-in variable & (ampersand) 2nd * (asterisk) 2nd in /etc/passwd files shell pattern-matching searches wildcards + (plus sign) / (backslash) /dev directory /dev/zero devices 00-INDEX files ' (single quotes) " (double quotes) 1000BASE-T 100BASE-T 10BASE-T 64-bit Fedora : (colon) < (less than) operator << here operator <= (less than or equal) operator = (equal sign) 2nd == string comparison operator > (greater than) operator >= (greater than or equal) operator ? (question mark) [ ] operator [global] section (/etc/samba/smb.conf file) [homes] section (/etc/samba/smb.conf file) [printers] section (/etc/samba/smb.conf file) [programs] section (/etc/samba/smb.conf file) \' escape sequence \" escape sequence \\ escape sequence ` (backtick) {} (braces) | (bar operator) || (double pipe) number comparison operator string concatenation function ~ (tilde) |