启用root
设置root
用户密码
passwd root
启用root
密码
passwd -u root
允许root
用户登录
修改/etc/ssh/sshd_config
vim /etc/ssh/sshd_config
##修改
PermitRootLogin yes #默认为 PermitRootLogin prohibit-password
删除ubuntu
用户
- 登出
ubuntu
- 登录
root
- 删除
ubuntu
执行userdel -r ubuntu
ps:-r
代表将用户文件夹也删除
设置 ulimit
默认ulimit -a
ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 7873
max locked memory (kbytes, -l) 16384
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 7873
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
查询文档 man limits.conf
/etc/security/limits.conf
添加
* soft nproc 655350
* hard nproc 655350
* soft nofile 655350
* hard nofile 655350
root soft nproc 655350
root hard nproc 655350
root soft nofile 655350
root hard nofile 655350
/etc/pam.d/common-session
添加
session required pam_limits.so
重新登录查询ulimit -a
ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 31649
max locked memory (kbytes, -l) 65536
max memory size (kbytes, -m) unlimited
open files (-n) 655350
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 655350
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited