Linux cmd Page 2
Controls advanced configuration settings for sound cards using the ALSA (Advanced Linux Sound Architecture) system. Settings are written to configuration files using the store function and loaded from those files with the restore function.
-f file, –f=file
Read and write raw MIDI files (.syx format, without timing information) to ALSA ports. For standard MIDI (.mid) files, use aplaymidi and arecordmidi.
Command-line ALSA mixer. For an ncurses interface, use alsamixer. amixer displays or changes the current mixer settings for the current sound card and sound device. To display all mixer settings, use with no flags or commands.
cset [control] [parameter]
set,sset [control] [parameter]
System administration command. Normally started in a system startup file. Execute commands periodically. By default, anacron reads a list of jobs from a configuration file, /etc/anacrontab. The file consists of shell variables to use when running commands, followed by a list of tasks to run. Each task specifies how often in days it should be run, a delay in minutes to wait before running the task, a unique job identifier used to store a timestamp, and the shell command to execute. Timestamps for the last run of each task are stored in the /var/spool/anacron file. For each task, anacron compares the stored timestamp against the current time. If the command has not been executed within the specified frequency, the command is run. Upon completion, anacron records the new date in the timestamp file. Limit anacron to a specified task by providing the task’s unique job identifier on the command line.
The anacron command is often used to support the cron daemon on systems that do not run continuously.
Play sound files using the ALSA sound system. The related arecord records sound files.
Play MIDI files using the ALSA sound system; output is to ALSA sequencer ports.
Display current Advanced Power Management hardware information, such as battery life, or send the system into standby or suspend-to-disk mode. Used on older systems, and replaced by acpi and related commands.
System administration command. apmd handles events reported by the Advanced Power Management BIOS driver. The driver reports on battery level and requests to enter sleep or suspend mode. apmd will log any reports it gets via syslogd and take steps to make sure that basic sleep and suspend requests are handled gracefully. You can fine-tune the behavior of apmd by editing the apmd_proxy script, which apmd runs when it receives an event. Note that the APM hardware standard is gradually being replaced by the ACPI (Advanced Configuration and Power Interface) standard, and apmd by acpid. On SUSE Linux, both APM and ACPI hardware are handled by powersave and powersaved.
-c n, –check n
-p n, –percentage n
-P command, –apmd_proxy command
-w n, –warn n
The apmd proxy script is invoked with the following parameters:
suspend [ system | user ]
standby [ system | user ]
resume [ suspend | standby | critical ]
Search the short manual page descriptions in the whatis database for occurrences of each string and display the result on the standard output. Like whatis, except that it searches for strings instead of words. Equivalent to man -k.
The Advanced Package Tool, the Debian package management system. A freely available packaging system for software distribution and installation. For detailed information on apt and its commands, see Chapter 5.