Index

Symbols

& (ampersand), X users commonly have many programs running at once.
* (asterisk), Quick Reference of login troubleshooting, On a UNIX system, your files can be shared with other users.
@ (at sign), You can use the finger command to find out what people are doing on other systems.
\ (backslash), The command might run, but not work correctly., On a UNIX system, your files can be shared with other users.
. (period; dot)
as a command, Add directories to your search path.
in filenames, On a UNIX system, your files can be shared with other users.
| (pipe; vertical bar), On a UNIX system, your files can be shared with other users., Some single commands actually spawn multiple processes.
_ (underscore), On a UNIX system, your files can be shared with other users.
“Command not found” error, Check if the command was misspelled.
“Empty input file” error, The lpr or lp command prints PostScript files. Other commands are needed to translate and print other kinds of files.
“Filesystem is full” error, When you get a message that a disk is full, first find out which filesystem is affected.
“No (or empty) input files” error, The lpr or lp command prints PostScript files. Other commands are needed to translate and print other kinds of files.
“No space left on device” error, When you get a message that a disk is full, first find out which filesystem is affected.
“Permission denied” error, If you don’t have read permission, you won’t be able to see the contents of the file.
“Write failed” error, When ...

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