使用echo创建文件
echo "aaaa" >> hello.txt
以追加的形式打开或创建文件,将字段写入到hello.txt;
echo "aaaa" > hello.txt
将字段写入hello.txt 覆盖之前的文件内容.在echo创建文件时写入换行
echo -e "aaaa\nbbbb" >> hello.txt
-e
代表执行转义,-E
代表禁止转义
有问题最好养成“找男人”的习惯,以下是manual:
NAME
echo - display a line of text
SYNOPSIS
echo [SHORT-OPTION]... [STRING]...
echo LONG-OPTION
DESCRIPTION
Echo the STRING(s) to standard output.
-n do not output the trailing newline
-e enable interpretation of backslash escapes
-E disable interpretation of backslash escapes (default)
--help display this help and exit
--version
output version information and exit
If -e is in effect, the following sequences are recognized:
\\ backslash
\a alert (BEL)
\b backspace
\c produce no further output
\e escape
\f form feed
\n new line
\r carriage return
\t horizontal tab
\v vertical tab
\0NNN byte with octal value NNN (1 to 3 digits)
\xHH byte with hexadecimal value HH (1 to 2 digits)
NOTE: your shell may have its own version of echo, which usually supersedes the version described here. Please refer to your shell's documentation for details about the options
it supports.