Split multiple lines after matching a pattern-CodePudding

Sorry for a newbie question but i have a file that looks like this and wanted to capture a line after a certain string which is /aggr.

/aggr0_usts_nz_3001/plex0/rg0:
9g.10.0            0   4.08    0.00   ....     .   4.08   1.00    41   0.00   ....     .
1a.10.1            0   4.08    0.00   ....     .   4.08   1.00    10   0.00   ....     .
9g.10.4            0   4.08    0.00   ....     .   4.08   1.00    49   0.00   ....     .
1a.10.1            0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
9g.10.4            0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
/aggr1_usts_nz_3001/plex0/rg0:
1e.00.0            0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
9o.01.44           0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
1e.00.1            4 994.04  994.04   1.44   119   0.00   ....     .   0.00   ....     .
9o.01.41           4 981.91  981.91   1.41   141   0.00   ....     .   0.00   ....     .
1e.00.4            4 811.19  811.19   1.14   149   0.00   ....     .   0.00   ....     .
9o.01.14           4 809.99  809.99   1.14   119   0.00   ....     .   0.00   ....     .
1e.00.1            4 980.86  980.86   1.19   144   0.00   ....     .   0.00   ....     .
9o.01.11           4 998.89  998.89   1.11   140   0.00   ....     .   0.00   ....     .
/aggr1_usts_nz_3001/plex0/rg1:
9a.10.14           0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
9e.40.14           0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
1g.11.14           4 999.10  999.10   1.16   110   0.00   ....     .   0.00   ....     .
1o.41.14           4 996.90  996.90   1.44   118   0.00   ....     .   0.00   ....     .
9a.10.11           4 911.11  911.11   1.44   116   0.00   ....     .   0.00   ....     .
9e.40.11           4 919.48  919.48   1.11   141   0.00   ....     .   0.00   ....     .
1g.11.11           4 900.44  900.44   1.16   146   0.00   ....     .   0.00   ....     .
1o.41.11           1 694.19  694.19   1.19   109   0.00   ....     .   0.00   ....     .
9a.10.14           4 941.44  941.44   1.61   111   0.00   ....     .   0.00   ....     .

i wanted to take out a certain line after say for example /aggr0 and redirect it to a file. so sample would be, file1 will have this information

/aggr0_usts_nz_3001/plex0/rg0:
9g.10.0            0   4.08    0.00   ....     .   4.08   1.00    41   0.00   ....     .
1a.10.1            0   4.08    0.00   ....     .   4.08   1.00    10   0.00   ....     .
9g.10.4            0   4.08    0.00   ....     .   4.08   1.00    49   0.00   ....     .
1a.10.1            0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
9g.10.4            0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .

and then file2 would be this information and so on.

/aggr1_usts_nz_3001/plex0/rg0:
1e.00.0            0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
9o.01.44           0   0.00    0.00   ....     .   0.00   ....     .   0.00   ....     .
1e.00.1            4 994.04  994.04   1.44   119   0.00   ....     .   0.00   ....     .
9o.01.41           4 981.91  981.91   1.41   141   0.00   ....     .   0.00   ....     .
1e.00.4            4 811.19  811.19   1.14   149   0.00   ....     .   0.00   ....     .
9o.01.14           4 809.99  809.99   1.14   119   0.00   ....     .   0.00   ....     .
1e.00.1            4 980.86  980.86   1.19   144   0.00   ....     .   0.00   ....     .
9o.01.11           4 998.89  998.89   1.11   140   0.00   ....     .   0.00   ....     .

so it's like segregating the information on the file.

had this command below but since lines after aggr are not the same, it will only show what was defined (which is 7)

for i in `cat sample.txt`; do
    echo $i | grep aggr* -A 7
done

but it's only showing what I grepped.

this command here prints 2 lines after matching the pattern however what i want is to redirect it to a file.

awk '/aggr/{x=NR 2}(NR<=x){print}' sample.txt

any idea how can I accomplish it.

CodePudding user response：

You may use this awk:

awk '/^\/aggr/ {close(fn); fn = "file"   fNo ".txt"} {print > fn}' file

CodePudding user response：

This might work for you (GNU csplit):

csplit -n1 -ffile file '/^\/aggr/' '{*}'

This will produce 4 file from your example file0 file1 file2 file3, where file0 is empty. If you don't mind numbers starting from zero, use:

csplit -zn1 -ffile file '/^\/aggr/' '{*}'

This will elide the first empty file.