Simple Shell commands for Informational purposes
to list the system conjobs
cat [opts] [filepattern] ?Print file contents on STOUT
-E :Display a $ at the end of each line.
-T :Show tabs as ^I.
-v :Show non-printing characters.
date [opts] ?Print or set the system date and time
–date=STRING :display time described by STRING.
–set=STRING :set time described by STRING.
dmesg [opts] ?Print or control the kernel ring buffer
-c :Clear the contents of the ring buffer.
file [opts] [filepattern] ?Determine the file type
-z :Try to look inside compressed files.
finger [opts] [userpattern] ?Show info about system users
-m :Match the exact username specified.
free [opts] ?Display free and used memory in the system
-b :Display the information in bytes.
hexdump [opts] ?Show all the characters of a file
-c :Display the input offset in hexidecimal
last [opts] [username] ?Show last system logins for users
-num :Show last num of sessions.
-a :Display the hostname in the last column.
-d :Translates IP numbers to their hostname.
:Use file as last log.
less [opts] [filepattern] ?View a file a page at a time
-i :Do case insensitive searching.
-S :Don?t wrap long lines.
man [opts] [section] ?View online manual pages.
-a :View all available manual pages for name.
-k string :Search for the specified string.
md5sum [opts] [filepattern] ?Show the uniqueness of files
ps [opts] ?Show what processes are running on the system
a :Select all processes on a terminal.
u :Display user oriented format. More columns.
x :Select processes without a controlling TTY.
w :Show an extra line of process entry per w.
Ex: ps auxwww =Displays all process information on system.
quota [opts] [user] ?Display disk usage and limits
-v :Display filesystems where no quota is set.
time [opts] [command] ?Show resource usage for a command
top [opts] ?Display top CPU processes every X seconds
-d sec :Set the delay to sec seconds before refreshing.
umask [opts] [mode] ?Set the default file permissions
-S :Show current symbolic umask.
uname [opts] ? Show OS and system information
-a :Show everything
uptime ? Show system uptime and load
w [opts] [user] ? Show who is logged in/what they are doing
whereis [command] ? Locate the related files for a command
which [command] ? Show full path to the specified command
who [opts] [args] ? Show who is logged in
? Check your ps output and see what it is running:
Harware info stuff :
Information regarding partitions :
just use shell and type df which will give you the allocated space for all your partitions !
cat /proc/cpuinfo —-List info about CPU.
and additional info!
/sbin/lspci —- list all PCI devices (result of probe) Also lspci -vvx and cat /proc/pci
cat /proc/interrupts —-List IRQ’s used by system.
cat /proc/ioports —-List I/O ports used by system.
cat /proc/dma —-List DMA channels and device used by system.