i find Mothur have a ion torrent butten link to an Example which show me how to analysis the ion torrent data( http://www.mothur.org/w/index.php?title=Ion_Torrent_sequence_analysis_using_Mothur&action=edit&redlink=1 ), but i click it, it show me with nothing... i want to know, where can i find the example~~~~(^-^！)

The result from the ion torrent machine are some fastq file. In the first line they have same title @OJWK, so I use the bash commands sed and awk) to change their first line to

@A143_#Number#__CTCCTACGGGAGGCAGCAG_Adult_2_ATTACCGCGGCTGCTGG_20160131_Adult_2_chengjun_barcode=2
______^^^^^^^^

and

@A143_1__CTCCTACGGGAGGCAGCAG_Adult_2_ATTACCGCGGCTGCTGG_20160131_Adult_2_chengjun_barcode=2
______^

and use bash command cat make a merge.fastq, and use Qiime script(Convert) let the fastq file become two file== fna and qual. It means I split library by myself, but I dont filter the fastq, means they would have many low level sequence...

my question:

1. it work? "split library by myself(use bash command)
2. how to filter the low level sequence? or if I don't filter the low level sequence what would happen?
3. anybody analysis ion torrent data? I want some tutorial or example~~~