Life is short , play more!
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[root@MAGIC ~]# TEST_CHAR=kkkkkkk [root@MAGIC ~]# echo $TEST_CHAR | wc -c (\n is printed by the echo) 8 [root@MAGIC ~]# echo ${#TEST_CHAR} 7 [root@MAGIC ~]# [root@MAGIC ~]# echo $TEST_CHAR | awk '{print length $0}' 7kkkkkkk [root@MAGIC ~]# echo $TEST_CHAR | awk '{print length ($0)}' 7 [root@MAGIC ~]# expr length $TEMP_CHAR expr: syntax error [root@MAGIC ~]# echo `expr length $TEMP_CHAR` expr: syntax error [root@MAGIC ~]# echo `expr length '$TEMP_CHAR'` 10 [root@MAGIC ~]# expr length '$TEMP_CHAR' 10 |
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