FILE exists and is a socket -t FD file descriptor FD is opened on a terminal -u FILE FILE exists and its set-user-ID bit is set -w FILE 파일이 존재하고 쓰기 가능한 파일인지 확인 FILE exists and write permission is granted -x FILE 파일이 존...
/bin/bash #2020-3-14 #监测文件是否被修改脚本 #监测目录 dir_file=(/etc) file_list=/usr/loca...
-k file 若文件存在且设置了"sticky"位的值 -p file 若文件存在且为一已命名管道,则为真 -r file 若文件存在且可读,则为真 -s file 若文件存在且其大小大于零,则为真 -u file 若文件存在且设置了SUID位,则为真 -w file 若文件存在且可写,则为真 -x file 若文件存在且可执行,则为真 -o file ...
#文件测试操作-d FILE_NAM # TrueifFILE_NAM is a directory-e FILE_NAM # TrueifFILE_NAM exists-f FILE_NAM # TrueifFILE_NAM existsandis a regular file-r FILE_NAM # TrueifFILE_NAM is readable-s FILE_NAM # TrueifFILE_NAM existsandisnotempty...
Start by creating the bash script file:nano deletefiles.shThe following script will create a new file named cars.txt, and then – with the help of the if statement – check if it exists and delete it.#!/bin/bash myfile='cars.txt' touch $myfile if [ -f $myfile ]; then rm cars...
echo "check if variable with name $1 exists"} assert_var "FOO"我们的期望是,应该检测变量FOO,同时也不存在BAR。为此,我需 浏览0提问于2020-07-01得票数 0 回答已采纳 2回答 以未实例化的变量为条件 我是Bash脚本的新手,对C-type语言有更多的经验。我已经编写了一些带有条件的脚本,用于检查未实例化...
Example 3: File Check #!/bin/bash file_path="/path/to/file.txt" if [ -f "$file_path" ] then echo "File exists." else echo "File does not exist." fi Compound Condition You can combine multiple conditions using logical operators like && (AND) and || (OR). Here’s an example:...
/bin/bash#shell读取文件的每一行内容并输出,方法1catfile_test |whilereadlinedoecho$linedone###,方法2#for line in \`cat file_test\`#do# echo $line#done ### 17.监控磁盘使用率 monitorDiskUsage.sh #!/bin/bash#监控磁盘使用率disks=(\`df|sed...
This is the job of the test command, which can check if a file exists and its type. Since only the check is completed, the test command sets the exit code to 0 or 1 (either false or true, respectively) whether the test is successful or not. ...
bash -c"echo 123"bash script.sh 上面这两种情况下,bash 运行完脚本,就退出了,不会出现 PROMPT,也不会等待用户输入新指令。 境变量$-里如果有字符i的话,代表是一个 interactive shell,否则是 non-interactive mode,我们可以简单测试一下: $>[[$-==*i*]]&&echo"Interactive"||echo"Not interactive"Interac...