一、需求：
把這些數據庫文件轉換成一行，然後用scp -r 一次性作拷貝。
二、實例
[root@mysql5 ~]# cat /tmp/1 ga_10122 ga_10589 ga_11053 ga_11238 ga_11559 ga_11944 ga_12193 ga_13542 ga_35179 ga_36013 ga_36063 ga_36575 ga_36737 ga_36926 ga_37962 ga_39596 ga_39599 ga_39603 ga_39604 ga_39605 ga_39608 ga_39609 ga_39610 ga_39614 ga_39618 ga_39619 ga_39622 ga_39625 ga_39626 ga_39630 ga_39633 ga_39636 ga_39639 ga_39640 ga_39642 ga_39645 ga_39648 ga_39652 ga_39654 ga_39657 ga_39668 ga_39675 ga_39687 ga_39690 ga_39691 ga_39693 ga_39695 ga_39697 ga_39702 ga_39703 ga_39704 ga_39708 ga_39715 ga_39717 ga_39724 ga_39725 ga_39727 ga_39728 ga_39730 ga_39732 ga_39738 ga_39741 ga_39743 ga_39753 ga_39757 ga_39761 ga_39765
三、解決有三種
1、採用awk
[root@mysql5 ~]# awk BEGIN{RS=EOF}'{gsub(/\n/," ");print}' /tmp/1
ga_10122 ga_10589 ga_11053 ga_11238 ga_11559 ga_11944 ga_12193 ga_13542 ga_35179 ga_36013 ga_36063 ga_36575 ga_36737 ga_36926 ga_37962 ga_39596 ga_39599 ga_39603 ga_39604 ga_39605 ga_39608 ga_39609 ga_39610 ga_39614 ga_39618 ga_39619 ga_39622 ga_39625 ga_39626 ga_39630 ga_39633 ga_39636 ga_39639 ga_39640 ga_39642 ga_39645 ga_39648 ga_39652 ga_39654 ga_39657 ga_39668 ga_39675 ga_39687 ga_39690 ga_39691 ga_39693 ga_39695 ga_39697 ga_39702 ga_39703 ga_39704 ga_39708 ga_39715 ga_39717 ga_39724 ga_39725 ga_39727 ga_39728 ga_39730 ga_39732 ga_39738 ga_39741 ga_39743 ga_39753 ga_39757 ga_39761 ga_39765awk默認將記錄分隔符（record separator即RS）設置爲\n，此行代碼將RS設置爲EOF（文件結束），也就是把文件視爲一個記錄，然後通過gsub函數將\n替換成空格，最後輸出。
2、採用sed
[root@mysql5 ~]# sed ':a ; N;s/\n/ / ; t a ; ' /tmp/1 ga_10122 ga_10589 ga_11053 ga_11238 ga_11559 ga_11944 ga_12193 ga_13542 ga_35179 ga_36013 ga_36063 ga_36575 ga_36737 ga_36926 ga_37962 ga_39596 ga_39599 ga_39603 ga_39604 ga_39605 ga_39608 ga_39609 ga_39610 ga_39614 ga_39618 ga_39619 ga_39622 ga_39625 ga_39626 ga_39630 ga_39633 ga_39636 ga_39639 ga_39640 ga_39642 ga_39645 ga_39648 ga_39652 ga_39654 ga_39657 ga_39668 ga_39675 ga_39687 ga_39690 ga_39691 ga_39693 ga_39695 ga_39697 ga_39702 ga_39703 ga_39704 ga_39708 ga_39715 ga_39717 ga_39724 ga_39725 ga_39727 ga_39728 ga_39730 ga_39732 ga_39738 ga_39741 ga_39743 ga_39753 ga_39757 ga_39761 ga_39765
說明：sed默認只按行處理，N可以讓其讀入下一行，再對\n進行替換，這樣就可以將兩行並做一行。但是怎麼將所有行並作一行呢？可以採用sed的跳轉功能。:a 在代碼開始處設置一個標記a，在代碼執行到結尾處時利用跳轉命令t a重新跳轉到標號a處，重新執行代碼，這樣就可以遞歸的將所有行合併成一行。
3、cat file | xargs
[root@mysql5 ~]# cat /tmp/1 | xargs ga_10122 ga_10589 ga_11053 ga_11238 ga_11559 ga_11944 ga_12193 ga_13542 ga_35179 ga_36013 ga_36063 ga_36575 ga_36737 ga_36926 ga_37962 ga_39596 ga_39599 ga_39603 ga_39604 ga_39605 ga_39608 ga_39609 ga_39610 ga_39614 ga_39618 ga_39619 ga_39622 ga_39625 ga_39626 ga_39630 ga_39633 ga_39636 ga_39639 ga_39640 ga_39642 ga_39645 ga_39648 ga_39652 ga_39654 ga_39657 ga_39668 ga_39675 ga_39687 ga_39690 ga_39691 ga_39693 ga_39695 ga_39697 ga_39702 ga_39703 ga_39704 ga_39708 ga_39715 ga_39717 ga_39724 ga_39725 ga_39727 ga_39728 ga_39730 ga_39732 ga_39738 ga_39741 ga_39743 ga_39753 ga_39757 ga_39761 ga_39765