user
I have no name
IPC
ipcs -q
ipcmk -Q
PID:
echo $$
mount:
mount -t proc proc /proc
UTS
pstree -pl
readlink /proc/111/ns/uts
readlink /proc/123/ns/uts
hostname test-hostname-01
hostname
enable user name space on centos:
/proc/sys/user/max_user_namespaces ">
grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
reboot
echo 640 > /proc/sys/user/max_user_namespaces
disable
grubby --remove-args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
reboot
