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16 Cards in this Set

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System status
df
free space
find YOURDIR -type f ¦ wc -l
count the number of files "-f" in a folder
find
search for files in a directory
du -h
Directory size information in human readable format
default unit: kb
grep
Usage: grep [options] [expression] [file(s)]

get specified data from a txt file
How set environmental variables?
edit .profile -file in ~ directory
run source .profile to apply changes
xargs
Adds arguments from standard input to command line until no arguments left.

usage: ls | xargs rm
-to overcome "argument list too long problem" you can pass arguments from ls wich always works to xargs wich will portion them fo rm.
mysql -utuomas -p -NBe "select ...;"
Running mysql from command line



options
-p password, must be separate
N skip column names
B give tab delimited output
e execute command in ""
less
a text viewer
!
Bash history expansion command

usage

!c
---> clear
reauth
Automatic AFS token renewal in a shell.

Usage:
reauth <time> <principal> [<password>]

where:
<time> is the time in seconds between reauthentications
<principal> is the name of the user
<password> is the user's password. If a password
is not specified on the command line,
it is read from the terminal
ps -A
Show all processes, saying on ps will give processes specific to the shell. Use ps -Aef togeather with grep to find the processes you want to see.
mpage
printtaus unixista

mpage -2to -Pbioinfor-colour tiedosto.ps
-P printterin nimi
-2 sivujen määrä paperiarkilla
-t kaksipuolinen printtaus
-o jätä kehykset pois
pdf2ps
Muuttaa pdf:n ps-muotoon.

pdf2ps syöttötiedosto.pdf tulostiedosto.ps

analoginen ohjelma ps2pdf
gv
GhostView

Ohjelma ps-tiedostojen katsomiseen