?20. mysql

mysql --host=127.0.0.1 --port=3306 --database=test --user=test --password=test --default-character-set=utf8

21. 腳本求兩個文件的相同集合

test1?? test2?

1?????????? 2

2?????????? 3

3?????????? 4

cat test1 test2 | sort | uniq -d (result: 2 3)

cat test1 test2 | sort | uniq -c | wc -l (result:4) 統計所有出現數字的個數

cat test1 test2 | sort | uniq -c |awk -F ' ' '{print $1}'|grep 2|wc -l 連續出現兩次的個數

22. 生成1到10的數字

?for i in `seq 10`
do

???? echo $i
?done

23. 通過腳本生成sql語句

      date=`date -d yesterday +%Y-%m-%d`

outputFileName="sql.${date}"

cat test1 | awk 'BEGIN{datecmd="date -d yesterday +%Y-%m-%d";datecmd|getline dateStr}{print "INSERT INTO test (dayString, num1, num2, num3) VALUES ('\''"dateStr"'\'', 0, "$1", "$1") ON DUPLICATE KEY UPDATE num2 = "$1", num3 = "$1";"}' > ${outputFileName}


    

?生成的結果：INSERT INTO test (dayString, num1, num2, num3) VALUES ('2014-06-07', 0, 1, 1) ON DUPLICATE KEY UPDATE num2 = 1, num3 = 1;
INSERT INTO test (dayString, num1, num2, num3) VALUES ('2014-06-07', 0, 2, 2) ON DUPLICATE KEY UPDATE num2 = 2, num3 = 2;
INSERT INTO test (dayString, num1, num2, num3) VALUES ('2014-06-07', 0, 3, 3) ON DUPLICATE KEY UPDATE num2 = 3, num3 = 3;

插入數據庫的話可以用腳本：mysql -h127.0.0.1 -P3306 -utest -ptest --database? testdb?< ${outputFileName}

24. awk

1）統計次數

test3

a=優秀

b=良好

b=優秀

c=良好

cat?test3 | awk -F "=" '{sum[$1]+=1}END{for(i in sum)print sum[i],i}'

cat?test3 | awk -F "=" '{sum[$2]+=1}END{for(i in sum)print sum[i],i}'

result1:???????????????? result2:???????????????? result3:

2 優秀??????????????????? 1 a?????????????????????? a=優秀
2 良好??????????????????? 2 b?????????????????????? b=良好

????????????????????????????1 c??????????????????????? c=及格

2) 提取20:1:0:0:{a=優秀, b=良好, c=及格} 里面的{}數據

cat test4 | awk 'BEGIN {FS=":"} {print $5}' | sed -e "s/[\{\}]//g" | awk '{split($0, items, ", ");for(it in items){print items[it]}}'

?25. sed

sed是一個強大的文本工具，這里舉一個替換配置文件的例子

from=1001
for i in {1002..1006} ; do
??? cat test-${from}.xml | sed -e "s/${from}/${i}/g" > test-${i}.xml
done;

Linux常用命令小結（續）