Linux awk Tips
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--From file aa.dat, print out line number and value of column 1 if column 1's length is greater than 10. Fields of aa.dat is delimited by comma.
awk -F, 'length($1) < 10 {print $1" line: " NR}' aa.dat
awk -F, 'length($1) < 10 {print $1" line: " NR}' aa.dat
11.txt包含的行数和文件名,下面的代码找出最大的行数。
/proddev/etldev/roam_monitor/DATA> cat 11.txt941 20140220_RM_HDO_ALERT_0002.dat918 20140220_RM_HDO_ALERT_0003.dat956 20140220_RM_HDO_ALERT_0004.dat1091 20140220_RM_HDO_ALERT_0005.dat1202 20140220_RM_HDO_ALERT_0006.dat2404 20140220_RM_HDO_ALERT_0007.dat1165 20140220_RM_HDO_ALERT_0008.dat1274 20140220_RM_HDO_ALERT_0009.dat1160 20140220_RM_HDO_ALERT_0010.datawk 'BEGIN{maxcnt = 0} {if (maxcnt < $1){maxcnt = $1}} END{print "maxcnt: "maxcnt}' 11.txtmaxcnt: 2404用sort 也可以实现
/proddev/etldev/roam_monitor/DATA> sort -n 11.txt918 20140220_RM_HDO_ALERT_0003.dat941 20140220_RM_HDO_ALERT_0002.dat956 20140220_RM_HDO_ALERT_0004.dat1091 20140220_RM_HDO_ALERT_0005.dat1160 20140220_RM_HDO_ALERT_0010.dat1165 20140220_RM_HDO_ALERT_0008.dat1202 20140220_RM_HDO_ALERT_0006.dat1274 20140220_RM_HDO_ALERT_0009.dat2404 20140220_RM_HDO_ALERT_0007.dat
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