linux

###保持ssh连接不断 vim /etc/ssh/ssh_config

单位为秒

ServerAliveInterval 30

###scp

远程主机copy到当前系统

scp -P 22 xxx@XXX.XXX.XXX.XXX:/home/xxx/tmp/mysql-bin.001280 mysql-bin.001280

###too many open files

ulimit -a

• 不同帐号之间时无法共享设置的 su - userabc

lsof -n|awk '{print $2}'|sort|uniq -c|sort -nr|more

cd /proc/进程id/fd

ls |wc -l

lsof -p 22421|wc -l

cat /proc/进程id/limits