ls -al | grep “May 30” | awk ‘{print $5}’ > ttt.x
다음에서 ls -al 위 명령어를 실행하면
-rw-r–r– 1 oratst dba 54335 May 27 10:10 stat_0527_10:10.lst -rw-r–r– 1 oratst dba 53680 May 27 10:20 stat_0527_10:20.lst -rw-r–r– 1 oratst dba 53680 May 27 10:30 stat_0527_10:30.lst -rw-r–r– 1 oratst dba 57087 May 27 10:40 stat_0527_10:40.lst -rw-r–r– 1 oratst dba 55122 May 27 10:50 stat_0527_10:50.lst
awk(1) awk(1)
NAME awk – pattern-directed scanning and processing language
SYNOPSIS awk [-Ffs] [-v var=value] [program | -f progfile …] [file …]
DESCRIPTION awk scans each input file for lines that match any of a set of patterns specified literally in program or in one or more files specified as -f progfile. With each pattern there can be an associated action that is to be performed when a line in a file matches the pattern. Each line is matched against the pattern portion of every pattern-action statement, and the associated action is performed for each matched pattern. The file name – means the standard input. Any file of the form var=value is treated as an assignment, not a filename. An assignment is evaluated at the time it would have been opened if it were a filename, unless the -v option is used.
An input line is made up of fields separated by white space, or by regular expression FS. The fields are denoted $1, $2, …; $0 refers to the entire line.
Options awk recognizes the following options and arguments:
-F fs Specify regular expression used to separate fields. The default is to recognize space and tab characters, and to discard leading spaces and tabs. If the -F option is used, leading input -f progfile Specify an awk program file. Up to 100 program files can be specified. The pattern-action statements in these files are executed in the same order as the files were specified.
-v var=value Cause var=value assignment to occur before the BEGIN action (if it exists) is executed.
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