Search notes:

SQL*Plus: HOST

host executes a shell (or, on Windows, cmd.exe) command without leaving or terminating SQL*Plus.
The (stdout) output of the command is printed into the SQL*Plus console.
On Unix, host can be abbreviated with an exclamation mark (!).
On Windows, host can be abbreviated with a dollar sign ($). 
host shell-command
$ windows-cmd-command
! unix-shell-command

Restriction level

The host command is disabled if the restriction level is set to 1 or more: 
C:\> sqlplus -r 1 rene/rene

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Apr 11 15:41:09 2022
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Last Successful login time: Mon Apr 11 2022 15:23:16 +02:00

Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

SQL> host dir
SP2-0738: Restricted command "host" not available

See also

SQL*Plus

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1741088348, '3.16.156.201', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/SQL-Plus/host(68): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78