just noticed something odd ... on my fedora 27 system, the man page
for sysctl reads under PARAMETERS:
variable=value
To set a key, use the form variable=value where variable is the key
and value is the value to set it to. If the value contains quotes or
characters which are parsed by the shell, you may need to enclose
the value in double quotes. This requires the -w parameter to use.
hang on ... setting a variable "requires" the -w parameter? that's
explained further down:
-w, --write
Use this option when you want to change a sysctl setting.
as i read that, "-w" is *required* to modify a sysctl variable at
run-time, but i tested it with my favourite example:
# sysctl net.ipv4.ip_forward=0
and that modified that variable just fine with no need for "-w":
# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 0
#
so what exactly is "-w" for?
rday
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