adding the date into a file name

Adding the date into a file name helps record system information or provides a backup based on date. Using the year first allows for easier sorts when you have several files with the same name. This command: ifconfig -a > network.`date +'%Y_%m_%d'`.txt produces this: network.2014_07_23.txt This command: ifconfig -a > `date +'%Y_%m_%d'`-network.txt produces this: 2014_07_23-network.txt --> more 2014_12_23-network.txt lan0 Link encap:Ethernet HWaddr 11:11:11:11:11:11 inet addr: Bcast: Mask: UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:58541560 errors:0 dropped:0 overruns:0 frame:0 TX packets:55809888 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:46141382968 (44003.8 Mb) TX bytes:55666523858 (53087.7 Mb) Interrupt:16 lo Link encap:Local Loopback inet addr: Mask: UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:196167 errors:0 dropped:0 overruns:0 frame:0 TX packets:196167 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:16439051 (15.6 Mb) TX bytes:16439051 (15.6 Mb) You could create backup copies manually by typing: cp /etc/passwd `date +'%Y_%m_%d'`-etc-passwd.txt output: 2014_12_23-etc-passwd.txt cp /etc/group `date +'%Y_%m_%d'`-etc-group.txt output: 2014_12_23-etc-group.txt cp /etc/hosts `date +'%Y_%m_%d'`-etc-hosts.txt output: 2014_12_23-etc-hosts.txt A script could be written to backup a list of files and it could be run periodically via a cronttab.

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