ref: 9dd5bfa3e75f9c50898d99a1168ca30691c760a2
dir: /bin/sm2ger/
#!/bin/rc -e p=$home/p/sm2/ger cd $p || exit awk -v 'nword='20 ' { d[NR] = $0 } END{ srand() for(i=1; i<=nword; i++){ do x = int(rand()*1e6) % length(d) while(! (x in d)) h[i] = d[x] delete d[x] } for(i in h) print h[i] >>"db0" for(i in d) print d[i] }' db >/tmp/sm2.$pid mv /tmp/sm2.$pid db 's&m2' db0 >db1 cp db1 db0