echo-e"### Creating OS X Yosemite ISO ###\n"#echo-e"### Creating OS X Yosemite ISO ###\n"sleep30echo-n"Checking if application exists... "if[-d"/Applications/Install OS X Yosemite.app"]then echo"Application is already downloaded and ready to continue."sleep4breakelif[-f"$script...
Write a Bash script that checks if a directory named "workarea" exists and creates it if it doesn't. Code: #!/bin/bash# Check if the directory "workarea" existsif[!-d"workarea"];then# If the directory doesn't exist, create itmkdirworkareaecho"Directory 'workarea' created successfully."...
To delete an existing file, you can use anifstatement to check if the file exists and instruct the bash script to remove it. Start by creating the bash script file: nano deletefiles.sh The following script will create a new file namedcars.txt, and then – with the help of the if sta...
mailfolder=/var/spool/mail/james [ -r "$mailfolder" ] | | { echo "Can not read $mailfolder" ; exit 1; } echo "$mailfolder has mail from: " grep "^From " $mailfolder 该脚本首先判断mailfolder是否可读,如果可读则打印该文件 中 的"From" 一行。如果不可读则或操作生效,打印错误信息后脚...
Check if a Symbolic Link Points to a Directory: Write a Bash script that checks if a symbolic link named "dir_link" points to a directory. Code: #!/bin/bash # Check if "dir_link" exists and is a symbolic link if [ -L "dir_link" ]; then ...
For example, if we need to move all .bash files into the script folder and then give them execute permissions, our script would look like this:#!/bin/bash for FILE in $HOME/*.bash; do mv "$FILE" "${HOME}/scripts" chmod +x "${HOME}/scripts/${FILE}" done...
exists("./aFile.txt")Check if a file exists rm("./myFile")Delete a file dirName("./path/file.txt")Return the directory name for a path __dirnameReturns the absolute path (directory) containing theentryscript (works inside of CommonJS or ES module) ...
$ if [ -x a.out ]; then echo "File is executable"; else echo "File is not executable"; fi File is executable So, thetest‘sxflag proves if the file exists and is executable. 3. Ruling out the Directories Now let’s notice that thetest‘sxcheck alone would suggestthat a folderfoo...
if test -e /etc/passwd; then echo "alright it exists ... " else echo "it doesn't exist ... " fi # 和上面完全等价,[ 是个和 test 一样的可执行程序,但最后一个参数必须为 ] # 这个名字为 "[" 的可执行程序一般就在 /bin 或 /usr/bin 下面,比 test 优雅些 ...
cp myscript 然后再插入自己的函数。 让我们再看两个例子: 二进制到十进制的转换 脚本b2d 将二进制数 (比如 1101) 转换为相应的十进制数。这也是一个用expr命令进行数学运算的例子: #!/bin/sh # vim: set sw=4 ts=4 et: help() { cat < ...