The type command determines how a command name is interpreted. It can also be used to check if a command exists. For example, the above code is similar to the previous two but uses the type -p command to check if the grep command exists. ...
Check whether a given system command is installed (e.g, bash)Nicholas Cooper
In this tutorial, we’ll address how to check if the current Java environment is Oracle JDK or OpenJDK. 2. Introduction to the Problem As we’ve known, the command “java -version” will print the detailed Java version information. So, for example, if we run it on a machine with Orac...
方法1 把bin目录加到PATH环境变量中,比如你的mysql目录是/usr/local/mysql,你可以这样添加环境变量,vi ~/.bash_profile在文件的最后面添加 PATH=$PATH:/usr/local/mysql/bin export PATH 然后执行source ~/.bash_profile 这样就可以在任意目录执行mysql的所有命令了 方法2 mysqldump: command not found问题解决 ...
if [ -L "file_link" ]; then echo "Symbolic link 'file_link' created successfully." else echo "Failed to create symbolic link 'file_link'." fi Output: file_link: command not found Explanation: In the exercise above, ln -s input.txt file_link: This command creates a symbolic link na...
Here,filename.md5is the file containing the checksum you want to verify. For example, if you saved the checksum inravi.pdf.md5, the command would look like this: md5sum -c ravi.pdf.md5 If the file hasn’t been modified, you’ll see something like this: ...
The config file takes precedence over the command line, in contrast to most other CLI tools out there (and possibly contrary to user expectation) due to the way bash deals with variables and initialization. If you want the command line to take precedence, you'll need to test the value of...
/bin/bash # Check the list of your loop devices with the lsblk command because you might have loop100 in use LOOP_DEVICE="/dev/loop100" TABLE_FILE="<path to table file that you have created>" HOST_MOUNT_PATH="/var/log/pods" # create a working loop device and put filesystem on ...
If -B is given, <new_branch> is created if it doesn't exist; otherwise, it is reset. This is the transactional equivalent of $ git branch -f <branch> [<start point>] $ git checkout <branch> that is to say, the branch is not reset/created unless "git checkout" is successful. ...
If you're using the command line, use the following command to build and run the application: BashCopy node <FILE_NAME>.js Example JSON response A successful response is returned in JSON, as shown in the following example: JSONCopy