All of these start with a dollar sign, but I\'m having trouble rendering them
| Pattern | Explanation |
|---|---|
${#string} |
String Length |
${string:startpos} |
Extract substring of string starting at startpos |
${string:startpos:len} |
Extract substring of string starting at startpos with len chars |
${string#substring} |
Remove shortest match of substring from front of string |
${string##substring} |
Remove longest match of substring from front of string |
${string%substring} |
Remove shortest match of substring from back of string |
${string%%substring} |
Remove longest match of substring from back of string |
${string/substring/replacement} |
Replace first match of substring in string with replacement |
${string/substring/replacement} |
Replace all matches of substring in string with replacement |
${string/#substring/replacement} |
If substring matches front of string replace with replacement |
${string/%substring/replacement} |
If substring matches end of string replace with replacement |
See man bash for details.
| Pattern | Explanation |
|---|---|
| * | matches anything |
| ? | matches any one character |
| [A-Z] | matches any one character in the list |
[] can also use character classes surrounded by colons:
alnum alpha ascii blank cntrl digit graph lower print punct space upper word xdigit
You can also match things listed in a list (first\|second\|third) with \| between entries using these commands:
| Glob | Explanation |
|---|---|
| ?(pattern-list) | Matches zero or one occurrence of the given patterns |
| *(pattern-list) | Matches zero or more occurrences of the given patterns |
| +(pattern-list) | Matches one or more occurrences of the given patterns |
| @(pattern-list) | Matches one of the given patterns |
You can even have wildcards *?[] in those pattern lists. To enable extglob:
shopt -s extglob
then you can do:
!(pattern-list) Matches anything except one of the given patterns
tmux # create new tmux session
tmux a # attach to already running tmux session
You must use the prefix key to use any of the command keys. My prefix key is C-a, C-b is the default.
| Command Key | Action |
|---|---|
| d | detach from tmux session |
| c | create new window |
| w | list windows |
| n | next window |
| p | previous window |
| , | rename current window |
| \% | vertical split window into panes |
| \" | horizontal split window into panes |
| q | show pane numbers |
| <space> | toggle between pane layouts |
| <arrow key> (or hjkl in my config) | Move between panes |
| o | Cycle between panes |
| M-o | Rotate pane positions |
| C-<arrow key> | Resize current pane in steps of 1 cell |
| M-<arrow key> | Resize current pane in steps of 5 cell |
| { | go into copy mode, enter to exit, space to select and enter to finish selection and exit |
| } | past from copy mode |
You can get into command mode by doing C-a (or by default C-b) followed by a colon
| Command | Short Command | Required Arguments | Action |
|---|---|---|---|
| :break-pane | :breakp | Break current pane out into it\'s own new window | |
| :join-pane | :joinp | -t <destination window> | Join current pane into destination window number |
Source or destination panes are of the format <window number>.<pane number> and can be specified as -s and -t options to the following commands. If you leave out the window number, the current one is assumed. If you leave out -s, the current pane is assumed, if you leave out -t a new window is created.
vncserver on the remote server, this will display a line like
New '<hostname>:<port> (<username>)' desktop is <hostname>:<port>ssh -N -C -f -L 5900:localhost:5900 <username>@<hostname> where
5900 should be replaced with 5900 + <port> from abovevncserver -kill :<port> to kill the vnc
session