[root@master1 ~]# su - fengjian
-bash: ulimit: open files: cannot modify limit: Operation not permitted
-bash: ulimit: file size: cannot modify limit: Operation not permitted
-bash: ulimit: pending signals: cannot modify limit: Operation not permitted
解決辦法：
1. /etc/profile中添加
ulimit -n 1024000 ulimit -u unlimited ulimit -s unlimited ulimit -i 255983 ulimit -SH unlimited ulimit -f unlimited
2. /etc/security/limits.conf 添加
vim /etc/security/limits.conf
* hard nofile 1024000
* soft nofile 1024000
* hard nproc unlimited
* soft nproc unlimited
* soft core 0
* hard core 0
* soft sigpending 255983
* hard sigpending 255983
3. /etc/pam.d/sudo 中添加
session required pam_limits.so