linux basic command

1. strace 

strace -f -tt -o /tmp/gwenjie_vemkd_strace.log -p 5913 & 

　　-f 打印线程

 

2. sed 

cat vemkdperf.log | awk '{print $13, $19, $25}' | sed -s 's/</ /g'| sed -s 's/>/ /g' > vvv.txt