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."...
MyFile=cars.txt if [ -f "$MyFile" ]; then echo "$MyFile exists." else echo "$MyFile does not exist." fiRunning the script results in the following output:22. Check Inodes and Disk UsageInodes represent data units on a physical or virtual server. Each text file, video, folder, ...
mailfolder=/var/spool/mail/james [ -r "$mailfolder" ] | | { echo "Can not read $mailfolder" ; exit 1; } echo "$mailfolder has mail from: " grep "^From " $mailfolder 该脚本首先判断mailfolder是否可读,如果可读则打印该文件 中 的"From" 一行。如果不可读则或操作生效,打印错误信息后脚...
Check if a Symbolic Link Points to a Directory: Write a Bash script that checks if a symbolic link named "dir_link" points to a directory. Code: #!/bin/bash # Check if "dir_link" exists and is a symbolic link if [ -L "dir_link" ]; then ...
if test -e /etc/passwd; then echo "alright it exists ... " else echo "it doesn't exist ... " fi # 和上面完全等价,[ 是个和 test 一样的可执行程序,但最后一个参数必须为 ] # 这个名字为 "[" 的可执行程序一般就在 /bin 或 /usr/bin 下面,比 test 优雅些 ...
newfile=`echo "$file" | sed "s/${OLD}/${NEW}/g" ` if [ -f "$newfile" ]; then echo "ERROR: $newfile exists already" else echo "renaming $file to $newfile ..." mv "$file" "$newfile" fi fi done 这是一个复杂一些的例子。让我们详细讨论一下。第一个if表达式...
cp framework.sh 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() ...
And to use it in a script, encapsulates it within quotes as you've seen before: $mv"$filename""$new_filename" Writing loops and using variables opens the door for more complex file manipulations and is a gateway to shell scripting which is beyond this introductory article. However, shell...
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...
The script clones the nvm repository to ~/.nvm, and attempts to add the source lines from the snippet below to the correct profile file (~/.bashrc, ~/.bash_profile, ~/.zshrc, or ~/.profile). If you find the install script is updating the wrong profile file, set the $PROFILE env ...