字符串对象分割【cut】

cut -dchar -ffilednum

Cut one line into different fileds by char, and then print out the filednumth filed.

Blank and no blank are optional between -d and char or between -f and filednum.

cut -ccharnum

Print out the charnum char of one line.

filednum and charnum have the same formats as following:

N: indicate the Nth filed or char

N-: indicate the fileds or chars from the Nth filed or char to the end of this line

N-M: indicate the fileds or chars from the Nth filed or char to the Mth filed or char of this line

-N: indicate the fileds or chars from the first filed or char to the Nth filed or char of this line.

[nick@d01 bash]$ cat cut.txt root:tree:1234 nick:leaf:4567 [nick@d01 bash]$ cut -d : -f 3 ./cut.txt 1234 4567 [nick@d01 bash]$ cut -d: -f-2 ./cut.txt root:tree nick:leaf [nick@d01 bash]$ cut -d: -f2- ./cut.txt tree:1234 leaf:4567 [nick@d01 bash]$ cut -c1-3 ./cut.txt roo nic [nick@d01 bash]$ cut -c-3 ./cut.txt roo nic [nick@d01 bash]$ cut -c3- ./cut.txt ot:tree:1234 ck:leaf:4567

-d and -c are not permitted to use at the same time.