线上问题排查，这些命令你一定用得到！
netstat -n | grep 1.2.3.4:22 | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}’ netstat -lnpta | grep ssh | egrep “TIME_WAIT | CLOSE_WAIT | ESTABLISHED” n [仅限于阿里云]
bzcat suyun.2019-06-26.log.bz2 | grep '1.2.3.4' | wc -l bzgrep '1.2.3.4' suyun.2019-06-26.log.bz2 | wc -l less suyun.2019-06-26.log.bz2 | grep '10.37.9.11' | wc -l
ps -eLf | wc -l pstree -p | wc -l
find / -type f -name "*log*" | xargs ls -lSh | more du -a / | sort -rn | grep log | more find / -name '*log*' -size +1000M -exec du -h {} \;
sed -n '/^[#]/!p' server.conf sed -e '/^#/d' server.conf grep -v "^#" server.conf