The command created the directory that does not exist and also parent directories that did not exist for the given path. For example: Create folder if not exists in Bash 1 2 3 mkdir -p test/bash/scripts It will create folders test, test/bash, and test/bash/scripts if they don’t ...
if [ ! -f "$FILE" ]; then echo "$FILE does not exist." fi 或者: [ ! -f /etc/docker ] && echo "$FILE does not exist." 检查是否有多个文件存在 你可以使用 -a(或 && 与 [[ )来测试是否存在多个文件,而不是使用复杂的嵌套的 if/else 结构。 if [ -f /etc/resolv.conf -a -f /...
You might want to check if file does not exist in bash in order to make the file manipulation process easier and more streamlined. This is the job of the test command, which can check if a file exists and its type. Since only the check is completed, the test command sets the exit co...
[student@studentvm1 testdir]$ File="TestFile1" ; echo "This is $File" > $File ; if [ -s $File ] ; then echo "$File exists and contains data." ; elif [ -e $File ] ; then echo "$File exists and is empty." ; else echo "$File does not exist." ; fi TestFile1 exists ...
if[ $gender...---wrong if [$gender...---wrong. 3 条件测试的内容,如果是字符串比较的话, 比较符号两边要留空格! eg: if [ $gender = femal ]; then---right. if [ $gender= femal ]; then---wrong. if [ $gender=femal ]; then---wrong. 4 如果if 和 then写在同一行, ...
[-f/etc/resolv.conf]&&echo"$FILEexist"||echo"$FILEdoes not exist" 检查目录是否存在 运算符-d允许您测试文件是否是目录。 例如,要检查/etc/docker目录是否存在,您将使用: FILE=/etc/dockerif[-d"$FILE"];thenecho"$FILEis a directory"fi
If语句:If单分支语句If双分支语句If多分支语句一、条件测试:text命令:测试特定的表达式是否成立,当条件成立时,测试语句的返回值为0,否则为其他数值格式一:test条件表达式格式二:[条件表达式]1、文件测试文件比较[操作符文件或目录]常用的测试操作符L:-d:测试是否为录(directory)-e:测试目录或文件是否存在(exist)-...
Create the DIRECTORY(ies), if they do not already exist. Mandatory arguments to long options are mandatory for short options too. -m, --mode=MODE set file mode (as in chmod), not a=rwx - umask -p, --parents no error if existing, make parent directories as needed -v, --verbose ...
/bin/bash#Device=/dev/sda3ifmount|grep"$Device"&>/dev/null;thengrep"$Device"|cut-d""-f3elseecho"$Deviceis not exist"fi 1. 2. 3. 4. 5. 6. 7. 8. 三、bash条件测试 1.整数测试 2.字符测试 3.文件测试 整数测试:数值1比较符号数值2...
for((i=0; i < 10; i++))doif(( i % 2 == 0));thenecho$i是偶数elseabcdefgfidone&>output.log [ken bash]$catoutput.log 0是偶数 -bash: abcdefg:commandnot found 2是偶数 -bash: abcdefg:commandnot found 4是偶数 -bash: abcdefg:commandnot found ...