The “$?” is a built-in variable that your shell uses to store the exit status code of the last executed command in integer format and remains unchanged unless the next command is executed. Using this exit status code, you can debug the problem that occurred while executing the command, ...
51. What does .exit command do? It exits the sql prompt It exits the sqlite prompt It exits the PL/SQL prompt None of the above Answer:B) It exits the sqlite prompt Explanation: The .exit command exits the sqilte prompt. Learn & Test Your Skills ...
You can also use . (dot) instead of source command like this: . filename [options] How does source command work? The syntax of this command is simple, but understanding it requires a slightly deeper look at some Linux concepts. If you’re brand new to Linux or programming, you might o...
On the details page of a workload, if an event is displayed indicating that the container fails to be started, perform the following steps to locate the fault:Rectify the
You must not use the addition AT EXIT COMMAND in connection with the statement FIELD. The function type of a function is determined in the Screen Painter or Menu Painter. Usually those functions of the user interface are defined with function type "E" that are assigned to the icons Back,...
After logging in to the database, execute SQL commands to perform database operations. After executing the commands, enter \q to exit the database. For example: Run the following command to delete the redundant records: delete from LINK_CLONE_TEMPLATES where backend_type like 'DSWARE@FusionStora...
Run the following command to modify the configuration file: vi /etc/grub2-efi.cfg Press i to edit the file. Set scsi_mod.use_blk to 0, as shown in the following figure. After the modification is complete, press Esc to exit editing mode and enter :wq! to save the...
The changes are saved. To reflect the changes in the bash, either exit and launch the terminal again. Or use the command: $source.bashrc Copy To run the function just created call today : $ today Copy Let’s create another function. This would combine the process of creating a directory...
If no command output is displayed, go to2. Back up the GRUB file. If the ECS runs CentOS 6, run the following command: cp /boot/grub/grub.conf /boot/grub/grub.conf.bak If the ECS runs CentOS 7, run the following command:
In this tutorial, we will cover the whoami command that is available on Linux systems. The whoami command is short for “Who am I” and will print the effective username of the user that invoked the command. It is a fundamental command and will come in handy if you need to know the...