![]() mit dem Tool ifconfig oder dem Befehl ip a zu. Appending 0.disable_ipv6=1 to /etc/nf or a new file in the /etc/sysctl.d/ directory, we can make the setting permanent for that interface. 1.1.1 Debian und Ubuntu (bis 17.04) 1.1.2 Ubuntu (ab 17.10). Hence, we successfully disabled IPv6 for a given interface. In fact, we can’t set an IPv6 address, even as a superuser: # ip -6 addr add 2001:0db8:0:0666::1/64 dev eth0 Now, the inet6 lines have disappeared, as expected. After this, we disable IPv6 for the eth0 interface and again poll the network settings: $ sysctl 0.disable_ipv6=1 Create sub interface or Secondary IP Address on Ubuntu Debian - GitHub. Type this command: sudo nano /etc/nf Add the following at the bottom of the file:. Indeed, we have an IPv6 address set as 2001:db8:0:666::1/64. Debian-based distributions Open the terminal window. Does it have something to do with prefix delegation If so, do I have to configure it And the linux documentation project (i.e. Inet 192.168.6.66/24 brd 192.168.6.255 scope global noprefixroute eth0 The official Debian networking documentation tells to use: ifup 6to4 But ifup is not found (ifupdown and ifupdown2 are commands not found too, even after having been installed). Next, we check the current network interface settings: $ ip address show eth0Ģ: eth0: mtu 1500 qdisc mq state UP group default qlen 1000 We have left IPv6 enabled and allowed globally and on eth0. Our target network interface will be eth0.įirst, we check the current values of the IPv6 disabling settings: $ sysctl .disable_ipv6 To that end, we’ll poll or attempt to change our interface with ip before and after toggling them. Let’s see how configuring the kernel network options takes effect. Lastly, we write a new value with =, which sysctl automatically echoes to confirm. After that, we verify the value of the setting with sysctl by passing its proper breadcrumb path. Next, we use printf and stream redirection to write a new value in the file. ![]() ![]() $ printf 9223372036854775806 > /proc/sys/fs/file-maxįirst, we check the setting by displaying the contents of /proc/sys/fs/file-max with cat. Now, let’s read and change a setting directly and via sysctl: $ cat /proc/sys/fs/file-max The list is long but aims to replicate the structure of /proc. Let’s use it to see all available settings: $ sysctl -all To organize these changes and make them easier to perform, many Linux distributions provide the sysctl utility. Essentially, reading files from /proc extracts configuration parameters, while changing files in /proc modifies settings. These are spread in a hierarchical structure of directories and files. As we can see, besides them, there are many general categories of information.
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