A consolidated reference for hash shell features.
| Option | Description |
|---|
-c string | Execute commands from string |
-i | Force interactive mode |
-l, --login | Run as login shell |
-s | Read from stdin |
-v, --version | Print version |
-h, --help | Show help |
| Key | Action |
|---|
Left/Right | Move cursor |
Up/Down | History navigation |
Ctrl+A | Beginning of line |
Ctrl+E | End of line |
Home/End | Beginning/End of line |
| Key | Action |
|---|
Backspace | Delete before cursor |
Delete | Delete at cursor |
Ctrl+U | Delete to beginning |
Ctrl+K | Delete to end |
Ctrl+W | Delete word |
| Key | Action |
|---|
Tab | Auto-complete |
Ctrl+L | Clear screen |
Ctrl+C | Cancel line |
Ctrl+D | EOF / Exit |
| Operator | Description |
|---|
| | Pipe stdout to stdin |
> | Output to file (overwrite) |
>> | Output to file (append) |
< | Input from file |
2> | Stderr to file |
&> | Both stdout and stderr |
2>&1 | Stderr to stdout |
&& | Run if previous succeeded |
|| | Run if previous failed |
; | Run sequentially |
& | Run in background |
| Variable | Description |
|---|
$? | Exit code of last command |
$$ | Shell process ID |
$0 | Shell/script name |
$1-$9 | Positional arguments |
$# | Number of arguments |
$@ | All arguments (separate) |
$* | All arguments (single) |
| Test | Description |
|---|
-e | Exists |
-f | Regular file |
-d | Directory |
-r | Readable |
-w | Writable |
-x | Executable |
-s | Size > 0 |
-L | Symbolic link |
| Test | Description |
|---|
-z | Empty string |
-n | Non-empty string |
= | Equal |
!= | Not equal |
| Test | Description |
|---|
-eq | Equal |
-ne | Not equal |
-lt | Less than |
-le | Less or equal |
-gt | Greater than |
-ge | Greater or equal |
| Sequence | Description |
|---|
\w | Full path |
\W | Current directory |
\u | Username |
\h | Hostname |
\g | Git branch + status |
\e | Exit code color |
\$ | $ or # |
\n | Newline |
| Pattern | Description |
|---|
!! | Last command |
!n | Command number n |
!-n | n commands ago |
!prefix | Last starting with prefix |
| Variable | Description |
|---|
HISTSIZE | Commands in memory |
HISTFILESIZE | Commands in file |
HISTFILE | History file location |
HISTCONTROL | History behavior |
PS1 | Prompt format |
PATH | Command search path |
HOME | Home directory |
EDITOR | Default editor |
| Command | Description |
|---|
alias | Define/list aliases |
unalias | Remove alias |
cd | Change directory |
pwd | Print working directory |
echo | Print arguments |
export | Set environment variable |
source | Execute file in current shell |
exit | Exit shell |
logout | Exit login shell |
history | Show command history |
jobs | List background jobs |
fg | Bring job to foreground |
bg | Continue job in background |
kill | Send signal to process |
test | Evaluate expression |
[ | Same as test |
true | Return success |
false | Return failure |
| File | When Loaded |
|---|
/etc/profile | Login shell |
~/.hash_profile | Login shell |
~/.profile | Login shell (fallback) |
~/.hashrc | Interactive shell |
~/.hash_logout | Login shell exit |