Linux uses Xargs to get strings as arguments for output, and awk to get strings as arguments for output

Background:

Cat Test.txt 1 3 4

Instance:

1, Xargs

Cat Xargs Echo {}

Cat Xargs Echo {}

The case I parameter is not the same effect, the lowercase i default parameter is {}, and cannot be changed, and the uppercase I parameter is custom, can be {}, a ... Wait a minute.

2. awk

Awk is becoming a language, and {} code blocks can be written using the shell, which is equivalent to a dynamic language.

Cat awk ' {print $} '

$n: the nth field of the current record, for example, N is 1 for the first field, and N for 2 for the second field.

$: This variable contains the text content of the current line during execution.

Reference:

Http://man.linuxde.net/awk

Http://man.linuxde.net/xargs

Linux uses Xargs to get strings as arguments for output, and awk to get strings as arguments for output