Cara menambahkan string tanggal ke setiap baris file log yang terus ditulis

Dengan perl:

command 2>&1 | perl -pe 'print scalar(localtime()), " ";'

Dengan melongo:

command 2>&1 | awk '{ print strftime(), $0; fflush() }'

Ganti command dengan tail -f logfile untuk contoh spesifik Anda. Atau, mungkin Anda bisa mengalihkan stdout/stderr program asli ke pipa di atas.

Coba

tail -f logfile | while read line; do echo `date` "$line" ; done

Anda dapat mencoba ini

cat /etc/motd | xargs -d"\n" -I {} date +"%Y-%m-%d %H:%M:%S {}"

Contoh keluaran:

2013-02-26 15:13:57 
2013-02-26 15:13:57 The programs included with the Debian GNU/Linux system are free software;
2013-02-26 15:13:57 the exact distribution terms for each program are described in the
2013-02-26 15:13:57 individual files in /usr/share/doc/*/copyright.
2013-02-26 15:13:57 
2013-02-26 15:13:57 Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
2013-02-26 15:13:57 permitted by applicable law.