#Do not add a space between variable and '='. arg2=$arg1 #correct assignment arg2 = $arg1 #incorrect assignment
Here is what the above code is Doing:
1. arg1 is assigned the value of the first command line argument.
2. arg2 is assigned the value of arg1.
3. arg2 is assigned the value of the first command line argument.
crontab -e @reboot /home/user/test.sh Here is what the above code is Doing: 1. It’s creating a new file called test.sh in the home directory of the user. 2. It’s adding the following line to the file: #!/bin/bash 3. It’s adding the following line to the file: python /home/user/test.py 4. It’s adding the following line to…
Move cursor to end of file in vim In short press the Esc key and then press Shift + G to move cursor to end of file in vi or vim text editor under Linux and Unix-like systems Here is what the above code is Doing: 1. Press the Esc key to enter normal mode….
#In your php.ini configuration file simply uncomment the extension ;extension=php_pdo_mysql.dll #in ubuntu, you can run sudo apt-get install php8.0-pdo-mysql #I recommend wsl for windows users Here is what the above code is Doing: 1. We’re creating a connection to the database using the PDO class. 2. We’re creating a prepared statement using the prepare() method….
# This will delete all empty files in directory /tmp find /tmp -size 0 -print -delete Here is what the above code is Doing: 1. find /tmp -size 0 -print -delete 2. find /tmp -size 0 -print 3. find /tmp -size 0 4. find /tmp 5. find
#!/bin/sh echo “Removing unused cert/key from nvram…” for i in 1 2 3 4 5 do nvram unset vpn_crt_client$i\_ca nvram unset vpn_crt_client$i\_extra nvram unset vpn_crt_client$i\_crt nvram unset vpn_crt_client$i\_key nvram unset vpn_crt_client$i\_crl nvram unset vpn_crt_client$i\_static done for i in 1 2 do nvram unset vpn_crt_server$i\_ca nvram unset vpn_crt_server$i\_dh nvram unset vpn_crt_server$i\_ca_key nvram unset vpn_crt_server$i\_extra nvram unset…
int number; // = some int while (number > 0) { print( number % 10); number = number / 10; } Here is what the above code is Doing: 1. We start with a number. 2. We print the last digit of the number. 3. We remove the last digit of the number. 4. We…