the utility nm-online will tell you whether the network is up or down. If the network is up, the command returns zero as its exit code; it’s nonzero otherwise. (For more on how to use an exit code
but they contain the word warning. A warning usually means something is wrong but the program will try to continue running anyway. To fix a problem noted in a warning message, you may have to hunt down a process and kill it before doing anything else. (You’ll learn about listing and...
instead we jump past it. Otherwise, we call it to set up profiling. It runs a routine to start profiling, and calls at_exit to schedule another routine to run later to write gmon.out at the end of execution.
Save and exit /etc/profile Edit /etc/rsyslog.conf and add the following lines to the bottom of the file: 1 2 # command line audit logging local1.* -/var/log/cmdline Save and exit /etc/rsyslog.conf Either restart the rsyslog service, or restart the whole machine to release all user...
If an error does occur during mounting, you can safely ignore an error that may occur when you unmount /rescue/boot in the step 5e. Troubleshoot the chroot environment. Use the following commands to exit the chroot environment: Bash Copy exit umount /rescue/proc/ umount /rescue/sys/ umoun...
The threads exit from the start function using the pthread_exit() function with a return value. In the main function after the threads are created, the pthread_join() functions are called to wait for the two threads to complete. Once both the threads are complete, their return value is ac...
When fatalerrorhappened, we’d like tokillthe program.How toexit the program inNode.js? You can use: process.exit() Here, “process” is a global process object. exit method ends the process. process.exit([code]) Ends the process with the specified code. If omitted, exit uses the ...
2.1. Using theviewCommand Many Linux users prefer to use theviewcommand to open a file in a read-only mode. The usage of theviewcommand is identical to the vimcommand. So let’s open thefile.txtfile using theviewcommand: $ view file.txt ...
This chapter is a guide to the Unix commands and utilities that will be referenced throughout this book. This is preliminary material, and you may ...
sorts these by CPU usage, so you can see the busiest processes first.topwill continue running in your shell until you stop it using the standard key combination ofCtrl+Cto exit a running process. This sends akillsignal, instructing the process to stop gracefully if it is able to. ...