Shell'tr'命令返回一个新的空行

Question

I had a problem with trim command in Unix. I had a original.csv file saved from windows excel that I wanted to port to use in Unix. The content in original.csv saved from windows is like:

Func,Failing Cycle
rtg_generic_A_A1_N2_cb_TEST_1_sm32,859180
rtg_generic_A_A1_N3_cb_TEST_1_sm32,859180
rtg_generic_A_A3_N5_dw_cb_TEST_1_sm32,788581 

I wanted to trim off the carriage return in it so I put command:

tr '\r\n' '\n' < original.csv >trimmed.csv

yet the content inside trimmed.csv looks like:

Func,Failing Cycle

rtg_generic_A_A1_N2_cb_TEST_1_sm32,859180

rtg_generic_A_A1_N3_cb_TEST_1_sm32,859180

rtg_generic_A_A3_N5_dw_cb_TEST_1_sm32,788581

It seems additional empty line is added in between. May I know why and how I can get rid of this empty line?

Thanks

Answer 1

This command:

tr '\r\n' '\n'` < file

will translate each instance of \\r into \\n as tr translates character by character. This will make each line end with 2 \\n .

To delete carriage returns, you can use this tr command:

tr -d '\r' < file

Answer 2

要将行结尾从Windows转换为Unix，您还可以使用dos2unix命令