Moved linux to new directory 'os'

1 files changed, 0 insertions, 68 deletions

diff --git a/linux/linux-commands.md b/linux/linux-commands.md
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-#### Job Control  
-* List jobs, job_id is the numerical value of the job  
-  `$ jobs`  
-* suspend job into background, similar to pause so that one can can do something else  
-`<Ctrl-Z>`  
-* Can resume it's running in the background by:  
-  `$ bg <job_id>`  
-* Bring it back to foreground by inserting:  
-  `$ fg`  
-* Or in case of multiple jobs:  
-  `$ fg %<job_id>`  
-* To suspend the process running in the background, use:  
-  `$ kill -STOP %job_id`  
-- - -
-
-#### Copying/Moving/Renaming Files/Directories  
-- Shorter syntax to copy/move from/to current file path (current working directory) `$(pwd)`  
-NOTE: `.` can also be used but is limited  
-  `$ cp -r $(pwd)/path-to/file ~/new/path/`  
-  `$ mv -r ~/another/directory/file .`  
-- - -
-
-#### Copying/Pasting Text  
-- Copy text/output of a command into a file (useful if in putty/non graphical terminal emulator)  
-  `$ <command> 2>&1 | tee -a output.txt`  
-  or  
-  `$ echo "text" 2>&1 | tee -a output.txt` # print text without executing a command  
-- - -
-
-#### Recall the Previous Command  
-- Use `!!` to express the last command  
-  For example if a command needs root permissions:  
-  ```bash
-  $ touch /opt/file.txt  
-  touch: cannot touch '/opt/file.txt': Permission denied  
-  $ sudo !!  
-  sudo touch /opt/file.txt  
-  [sudo] password for user:  
-  $ ls -l /opt/myFile.txt  
-  -rw-r--r-- 1 root root 0 Dec  21 16:20 /opt/file.txt  
-  ```
-
-    `!!:n` where n is the 0-based position of the argument you want.
-The ! prefix is used to access previous commands.
-
-- Other useful commands:
-
-    `!$` - last argument from previous command  
-    `!^` - first argument (after the program/built-in/script) from previous command  
-    `!*` - all arguments from previous command  
-    `!!` - previous command (often pronounced "bang bang")  
-    `!n` - command number n from history  
-    `!pattern` - most recent command matching pattern  
-    `!!:s/find/replace` - last command, substitute find with replace  
-- - -
-
-#### Getting information about a window  
-  - To get id, size, position, state, class, etc...  
-  `$ xwininfo`  
-  or  
-  `$ xdotool getwindowfocus getwindowgeometry` # just get size/position  
-- - -
-
-#### Listing all users on system
-  ``` bash 
-  $ cat /etc/passwd 
-  ``` 
-