Understanding an iptables shell script
SITUATION:
linux
Does any file system implement Copy on Write mechanism for CP?
We have seen OS doing Copy on Write optimisation when forking a process. Reason being that most of the time fork is preceded by exec, so we don’t want to incur the cost of page allocations and copying the data from the caller address space unnecessarily.
When does a shell get executed during the linux startup process
I do not understand when does a shell, lets say bash, get executed, which program runs bash initially first.
Is there a linux vfs tool that allows bind a directory in different location (like mount –bind) in user space?
For a user process, I want to mount a directory in other location but in user space without root privilieges. Something like mount –bind /origin /dest, but with a vfs wrapper. Like a usermode fine-tuned chroot.
How to disable USB devices based on their vendor ID on GNU/Linux?
In that question someone wanted a blacklist for all USB devices, and then only allow specific devices.
why can I see the directory without “read” privilege?
now i am user “lawrence.li” ,I can see directory “lijunda” with “read” privilege
how to unshare network for current process
It’s possible to run a new command without network access as non-root using unshare -r -n, for example:
256 color in Linux console
I have in my .bashrc
Linux VLAN-aware bridges and trunk ports
I have an ethernet port attached to a bridge:
How to append text to the end of a certain line of a file?
If I needed to append a username to the end line 32 on a file, how would I do so?