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echo

echo [-ne][字符串]或 echo [--help][--version]补充说明:echo会将输入的字符串送往标准输出。输出的字符串间以空白字符隔开, 并在最后加上换行号。参   数:-n 不要在最后自动换行-e 若字符串中出现以下字符,则特别加以处理,而不会将它当成一般文字输出:\a 发出警告声;\b 删除前一个字符;\c 最后不加上换行符号;\f 换行但光标仍旧停留在原来的位置;\n 换行且光标移至行首;\r 光标移至行首,但不换行;\t 插入tab;\v 与\f相同;\\ 插入\字符;\nnn 插入nnn(八进制)所代表的ASCII字符;--help 显示帮助--version 显示版本信息   范例 :   [root@localhost ~]# echo "what is your name "
what is your name 
[root@localhost ~]# echo "what is your name:\c "
what is your name:\c 
[root@localhost ~]# echo -e "what is your name:\c"
what is your name:[root@localhost ~]# 
[root@localhost ~]# echo -n "what is your name "
what is your name [root@localhost ~]# [root@localhost ~]# echo "\"/dev/cdrom\""
"/dev/cdrom"
[root@localhost ~]# [root@localhost ~]# echo "this is a echo command test to echotes.txt">echotes.txt
[root@localhost ~]# cat echotes.txt
this is a echo command test to echotes.txt
[root@localhost ~]# 
[root@localhost ~]# echo "$LOGNAME carry them out at `date` ">>echotes.txt
[root@localhost ~]# cat echotes.txt
this is a echo command test to echotes.txt
root carry them out at Mon Feb 16 13:18:14 CST 2009

本文标签: echo