How do I a manually make a permanent to kernel parameters in redhat without rebooting?

petulia3478

Also see: sysctl(8) - configure kernel parameters at runtime
sysctl.conf(5) - sysctl preload/configuration file

       -p[FILE], --load[=FILE]
              Load  in  sysctl   settings   from   the   file   specified   or
              /etc/sysctl.conf  if none given.  Specifying - as filename means
              reading data from standard input.  Using this option  will  mean
              arguments  to sysctl are files, which are read in the order they
              are specified.  The file argument may be  specified  as  regular
              expression.

Note comments in etc/sysctl.conf before making changes:

# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).

Edit /etc/sysctl.conf as appropriate then: this one way of doing it.

# sysctl -p

The /etc/sysctl.d/99-sysctl.conf is a symbolic link to /etc/sysctl.conf.