Index
Symbols and Numbers
: (colon)
/etc/passwd
IFS
. (dot)
BRE
regular expressions
relative filepaths
.. (dot-double), relative filepaths
; (semi-colon)
do
functions
IFS
mysql
sed
shell scripts
& (ampersand)
background mode
double-parentheses symbol
sed
STDERR
&& (ampersand-double)
double-parentheses symbol
PID
* (asterisk)
BRE
case
executable files
filter strings
ls
regular expressions
** (asterisk-double), double-parentheses symbol
\ (backslash)
for
bash shell prompt character
list
regular expressions
sed
sem
shell scripts
substitution
` (backtick)
bc
shell scripts
ˆ (caret symbol)
anchor character
regular expressions
sed
{} (curly brackets), ERE
$ (dollar sign)
bash shell
environment variables
sed
user variables
$$ (dollar sign-double)
bash shell
dash shell
= (equals sign)
disk space monitoring
environment variables
file permissions
user variables
! (exclamation mark)
double-parentheses symbol
sed
substitution
> (greater than symbol)
BSD-style parameters
output redirection
sed
>> (greater than symbol-double)
output redirection
statistics report
# (hash mark)
< (less than symbol)
input redirection
sed
<< (less than symbol-double)
double-parentheses symbol
inline input redirection
- (minus sign/dash)
BRE
file permissions
format specifier
-- (minus sign/dash-double)
Mutt
shift
-? (minus sign/dash-question mark), psql
--- (minus sign/dash-triple), permission code
| (pipe symbol)
double-parentheses symbol
ERE
regular expressions
sort
|| (pipe symbol-double), double-parentheses ...
