TCSH
TCSH Commands echo $0 = Prints which shell we are working in. which<command/shell> = Prints the absolute path of the installed location of the shell or the command. To install any package: apt install <package name> Eg: apt install tcsh Sudo install –y <package> Eg: sudo install –y tcsh To change from one shell to other shell we just need to type the shell name. Knowing present working directory PWD: This command gives the absolute path of the directory we are working in. Changing to another directory : cd Syntax: cd <path of the directory where we want to change> Cd - : it will change to the last opened directory. Creating an empty file: touch Syntax: touch <filename> Creating a directory: mkdir Mkdir means make directory; it creates an empty directory. Syntax: mkidr<directoryname> Mkdir –p directory1/directory2 : This creates a directory2 inside directory1 at one go with the help of option –p ( -p: parent). Concatenate command: Th...