linux - 如何在 Linux 上增加每个虚拟内存？(命令行)

Question

我只是为每个账户分配一些虚拟内存，

 pi@duckpi01 /etc $ ulimit -v 100
pi@duckpi01 /etc $ ulimit -v 200
-bash: ulimit: virtual memory: cannot modify limit: Operation not permitted
pi@duckpi01 /etc $ ulimit -v 99
pi@duckpi01 /etc $ ulimit -v 101
-bash: ulimit: virtual memory: cannot modify limit: Operation not permitted
pi@duckpi01 /etc $ ulimit -v 100
-bash: ulimit: virtual memory: cannot modify limit: Operation not permitted
pi@duckpi01 /etc $ ulimit -v 200
-bash: ulimit: virtual memory: cannot modify limit: Operation not permitted
pi@duckpi01 /etc $ cd security
pi@duckpi01 /etc/security $ vi limits.conf
Segmentation fault
pi@duckpi01 /etc/security $ sudo ulimit -v 200
Segmentation fault

但是现在我不能使用ulimit 分配超过99 的内存。显然，99kbytes 不足以让我做任何事情。我使用 sudo，但它不起作用。我该如何解决这个问题？

这行不通:

pi@duckpi01 /etc/security $ sudo mount -t tmpfs -o size=2048M tmpfs /media/nameme/
Segmentation fault
pi@duckpi01 /etc/security $ sudo mount -t tmpfs -o size=500M tmpfs /media/nameme/
Segmentation fault

这也行不通:

pi@duckpi01 /etc/security $ sudo ulimit -v unlimited
Segmentation fault
pi@duckpi01 ~ $ sudo su
Segmentation fault
pi@duckpi01 ~ $ mkdir -p /media/nameme
Segmentation fault
pi@duckpi01 ~ $ free -m
Segmentation fault
pi@duckpi01 ~ $ sudo ulimit -v
Segmentation fault
pi@duckpi01 ~ $ ulimit -v
99
pi@duckpi01 ~ $ su -u root
Segmentation fault

不起作用:

pi@duckpi01 ~ $ ulimit -c unlimited
pi@duckpi01 ~ $ ulimit -v
99
pi@duckpi01 ~ $ ulimit -v 10000
-bash: ulimit: virtual memory: cannot modify limit: Operation not permitted
pi@duckpi01 ~ $ ls
Segmentation fault

Answer 1

以 root 身份登录并重置限制:

su -u root    
ulimit -v unlimited

或者退出当前用户并以 root 身份登录:

logout