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...
我有一个名为"list.txt“的文件,上面有员工的名字--大多数都是"Raj",我想在bash中创建一个名为"findRaj.sh“的脚本-该脚本应捕获"list.txt”中的所有"Raj“行,并将其存储在名为"newlist.txt”的新文件中。data/list.txt; then echo "File exists"; els 浏览0提问于2020-02-21得票数 0 19回答 检查...
/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...
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...
Check if the directory still exists The -d operator allows you to test if a file is a directory. For example, to check if the /etc/filetocheck directory exists, you can use: NOTE: You can also use double brackets [[ instead of [ single brackets. Check if the file doesn’t exist ...
Example 3: File Check #!/bin/bash file_path="/path/to/file.txt" if [ -f "$file_path" ] then echo "File exists." else echo "File does not exist." fi Compound Condition You can combine multiple conditions using logical operators like && (AND) and || (OR). Here’s an example:...
/bin/bashLINE=1whileread CURRENT_LINEdoecho"${LINE}: $CURRENT_LINE"((LINE++))done < /etc/passwd# This script loops through the file /etc/passwd line by line 退出状态码,任何一个命令执行完成后都会产生一个退出状态码,范围0-255,状态码可以用来检查...
-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 ...
This script sets certain parameters in /etc/ssh/sshd_config. It's not production ready and only used for training purposes. What should it do? * Check whether a /etc/ssh/sshd_config file exists * Create a backup of this file * Edit the file to set certain parameters ...
Navigate to a directory where your hello_world.sh is located and make the file executable: $ chmod +x hello_world.sh Now you are ready to execute your first bash script: ./hello_world.sh 2. Simple Backup bash shell script #!/bin/bash tar -czf myhome_directory.tar.gz /home/linuxconf...