[student@studentvm1 testdir]$ File="TestFile1" ; rm $File ; if [ -s $File ] ; then echo "$File exists and contains data." ; else echo "$File does not exist or is empty." ; fi TestFile1 does not exist or is empty. 现在创建一个空文件用来测试: [student@studentvm1 testdir]...
[student@studentvm1 testdir]$ File="TestFile1" ; touch $File ; if [ -s $File ] ; then echo "$File exists and contains data." ; else echo "$File does not exist or is empty." ; fi TestFile1 does not exist or is empty. 向文件添加一些内容,然后再测试一次: [student@studentvm1 ...
01 research 4096 Oct 18 19:45 wrongDir $ rmdir wrongDir $ ## 非空目录无法删除 $ mkdir wrongDir2 $ touch wrongDir2/file1 $ ll wrongDir2/ total 0 -rw-r--r-- 1 r01 research 0 Oct 18 19:47 file1 $ rmdir wrongDir2 rmdir: failed to remove ‘wrongDir2’: Directory not empty...
[root@0x1e61 ~]# rmdir New_dir/a/ rmdir: failed to remove ‘New_dir/a/’: Directory not empty 在默认情况下,rmdir命令只删除空目录。 要想删除这个目录,需要先把目录中的东西删掉,然后才能在空目录中使用rmdir命令: [root@0x1e61 ~]# rmdir New_dir/a/b/ [root@0x1e61 ~]# rmdir New_dir/...
-z is the second supported bash string comparison operator used to check if a string is empty or not. The -z operator functions similarly like -n operator. Below is an example: Most importantly, you should add spaces around the square brackets. If there are no spaces, bash will complain ...
If you want to create a subdirectory and another subdirectory under it with one command, use the--parentsflag: Bash mkdir--parents orders/2019 Thermdircommand deletes (removes) a directory, but only if it's empty. If it's not empty, you get a warning instead. Fortunately, you can use...
# bash check if directory exists if [ -d $directory ]; then echo "Directory exists" else echo "Directory does not exists" fi 1. 2. 3. 4. 5. 6. 7. 8. 9. 9.2. Nested if/else #!/bin/bash # Declare variable choice and assign value 4 ...
Specifies the working directory in which you want to run the command. If you leave it empty, the working directory is$(Build.SourcesDirectory). failOnStderr-Fail on Standard Error boolean. Default value:false. If this is true, this task will fail if any errors are written to theStandardErr...
rmdir: read_only: Directory not empty $ rmdir --parents read_only/backup/january/ rm 命令永久性删除文件。如果文件是一个符号或硬链接文件,它删除链接而不是文件本身。 $ rm old_notes.txt $ ls old_notes.txt ls: old_notes.txt: No such file or directory ...
#!/bin/bash FILE=~/.bashrc if [ -e "$FILE" ]; then if [ -f "$FILE" ]; then echo "$FILE is a regular file." fi if [ -d "$FILE" ]; then echo "$FILE is a directory." fi if [ -r "$FILE" ]; then echo "$FILE is readable." fi if [ -w "$FILE" ]; then echo...