1、测试数据
root@DESKTOP-1N42TVH:/home/test2# ls a.map root@DESKTOP-1N42TVH:/home/test2# cat a.map ##测试数据 1 s64199.1 0 55910 1 OAR19_64675012.1 0 85204 1 OAR19_64715327.1 0 122948 2 s47174.1 0 167127 2 s30876.1 0 176079 2 s16671.1 0 361433 3 s44996.1 0 144010 3 s26048.1 0 199910 3 OAR3_312122.1 0 234281 root@DESKTOP-1N42TVH:/home/test2# sort -k 1 -u a.map ##-u没有起作用?? 1 OAR19_64675012.1 0 85204 1 OAR19_64715327.1 0 122948 1 s64199.1 0 55910 2 s16671.1 0 361433 2 s30876.1 0 176079 2 s47174.1 0 167127 3 OAR3_312122.1 0 234281 3 s26048.1 0 199910 3 s44996.1 0 144010 root@DESKTOP-1N42TVH:/home/test2# sort -n -k 1 -u a.map ## -u只能在数值时才起作用? 1 s64199.1 0 55910 2 s47174.1 0 167127 3 s44996.1 0 144010