>> nerdcafe Vetomat 19.7.2010 snufu/fuzzy speach, Zbog report
SHELL BASICS N°2
[c]$ nmap 192.168.1.0[/c]
scan the local subnet to check for available hosts – nmap returns all IPs of running machines in the specified subnet. 192.168.1.0-100 scans IPs 1-100.
(you ll need to apt-get install nmap)
[c]$ uptime[/c]
Shows when the pc started; how many users; load average; how many processes are running
[c]$ date[/c]
gives you back a date and time
[c]$ ncal[/c]
to call the calendar
[c]#[/c]
Comment sign
to insert a not exacutable text, frequently used for human comunication instead of the normal typing in the terminal that is readed by default as a command to the computer
[c]*[/c]
is a jolly to ask for existing files/Directory for example
[c]$ echo D*[/c]
gave:
Desktop Dokumente…
(every file with the D as first letter in the directory where we are located)
[c]?
$ fsdsf?[/c]
if you dont remember the last letter of a data
for example fsdfz
the command returns the possible files you are searching
like the asterisc but applies only on the last letter in doubt
[c]$[/c]
the dollar $ itself
means a variable
[c]|[/c]
the pipeline | between commands is to add multiple commands without writing multiple lines in the terminal
[c]""[/c]
are to consider the string as text
[c]$ rm filename[/c]
removes files – take care there is no restore the file will be deleted!
[c]$ clear[/c]
clean the monitor terminal from previous output lines
[c]$ iwlist wlan0 scan[/c]
scan for avalaible networks with network interface wlan0 (the 1. wlan card,usually)
[c]$ ps[/c]
programs running by everybody
[c]$ ps aux[/c]
more info about the running programs
[c]$ ps aux | less[/c]
pipe the processes output into “less” – just for easy reading
[c]>[/c]
to redirect and copy the command output to another program
[c]>>[/c]
append
attach the output left of >> to the end of the file right off >>
for example
[c]$ echo hiho > foobar
$ cat echo >> foobar[/c]
will give as output
foobar
foobar
[c]<[/c]
[c]\[/c]
(escape) to take out special meaning and read the value as text
example echo “mb\”r*” gives the output
mb”r
true is 0
and frequently in programming it is the opposite: true is 1 !!
[c]$ wc[/c]
words count
[c]$ wc -l[/c]
wordcount –lines
Report of Linux-works shell meeting in Vetomat 19.Juli.2010
