SYSTEMD-DEBUG-GENERATOR(8) systemd-debug-generator SYSTEMD-DEBUG-GENERATOR(8)NAME
systemd-debug-generator - Generator for enabling a runtime debug shell and masking specific units at boot
systemd-debug-generator is a generator that reads the kernel command line and understands three options:
If the systemd.mask= option is specified and followed by a unit name, this unit is masked for the runtime, similar to the effect of
systemctl(1)'s mask command. This is useful to boot with certain units removed from the initial boot transaction for debugging system
startup. May be specified more than once.
If the systemd.wants= option is specified and followed by a unit name, a start job for this unit is added to the initial transaction. This
is useful to start one or more additional units at boot. May be specified more than once.
If the systemd.debug_shell option is specified, the debug shell service "debug-shell.service" is pulled into the boot transaction. It will
spawn a debug shell on tty9 during early system startup. Note that the shell may also be turned on persistently by enabling it with
systemctl(1)'s enable command.
systemd-debug-generator implements systemd.generator(7).
SEE ALSO systemd(1), systemctl(1), kernel-command-line(7)systemd 237SYSTEMD-DEBUG-GENERATOR(8)
I need help!Many Thanks!
Now,I try to manage the shared memory inter-process .
Inevitably,I have to deal with the synchronous.
I know the pthread_rwlock in posix,and I compile ,then run successfully in Red Hat Enterprise 4.
I have a doubt about whether the Posix supports the system such as... (1 Reply)
I'm a user and a programmer of UNIX based systems (mainly FreeBSD and Linux).
I have never programmed or tried to fully understand the kernel layer. I haven't a special propouse for learning it, but I'd like to. Can anyone suggest me books, documentation or examples that may help me... (2 Replies)
I hope everybody is fine. I have been studing operating system concepts at college, and I find this subject very interesting. I've decided that I must go into this field no matter what, hopefully someday I would design my own operating system. I have two choices infront of me, studying... (9 Replies)
I am thinking of developing an app' for Android mobile devices...
Two questions here:-
1) Does anyone _develop_ for the Android _mobile_ platform?
If so do you use OSX 10.7.5 or greater as your _development_platform_?
2) I know ********* is gonna say that the Android terminal/shell is... (13 Replies)
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
I hope you are fine,
I'd like study Os I tried a book like Silberschatz it's a good book but like
other books it talks about the concepts abstractly and that's due to it try
to encompass many concepts from many operating systems in GENERAL.
i am not too much comfortable from these... (20 Replies)
I'm new on the site and do not write very well in English, I am now using osx platform and was attracted to her. For several searches on random websites for Unix content yours was the best and most interesting, I registered and already visualized some very interesting content. But I wonder where... (3 Replies)
I am new to this forum and this is my very first post, one i think i will look back at many years from now and have nothing to regret about.
This is simply because i recently installed Linux (Ubuntu) on my system and downloaded a book titled, The Unix Programming Environment. I... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)