The most common operating system {Unix} has many variations. At login prompt, enter username. At password prompt, enter password. To change password: passwd followed by old password, and repeat new password. To log out: logout. To create a directory: mkdir directory-name. To display file: cat filename or more filename. To print file: lpr filename. To list files and directories: ls directory-name or filename. To rename files and directories: mv source-filename destination-filename, or mv source-filename destination-directory, or mv source-directory-name destination-directory-name. To copy files: cp source-filename destination-filename or cp source-filename destination-directory. To delete file or directory: rm filename or rmdir directory-name. To change working directory: cd directory-name.
Pathnames use forward slash. ~ is Home directory. . is working directory. ..is parent of working directory.
wild cards
? is single character wild card. * is arbitrary number of characters.
redirecting
command-name > filename - System types output of command to file rather than screen, replacing current contents of file, if any.
command-name > > filename - System types output of command to file rather than screen, appending to current contents of file, if any.
editing files
vi - enter text editor
search files
grep search-string filename to type lines containing the string in a specific file.
online documentation
To see online Man Pages: man command-name.
Mathematical Sciences>Computer Science>Software>Operating System
3-Computer Science-Software-Operating System
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Date Modified: 2022.0224