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$ set $ env $ ps eaxwww $ cat .bashrc
... export http_proxy=http://proxy.isp.un:3128/ export https_proxy=http://proxy.isp.un:3128/ ...
# cat /etc/environment
http_proxy=http://proxy.isp.un:3128 https_proxy=http://proxy.isp.un:3128 no_proxy=localhost,::1,.debian.org
$ LANG="" date $ LANG="ru_RU.UTF-8" date $ EDITOR=nano crontab -e $ export http_proxy=http://gate.corpX.un:3128 $ wget http://gate.isp.un/virus.zip
$ a=Hello
$ set | grep '^a'
$ echo $a
$ export a
$ env | grep '^a'
$ dir=/bin
$ ls -l $dir
$ echo $a
$ a=pwd
$ $a
$ a='Hello World'
$ a="Hello World"
$ a=Hello\ World
$ a="Hello"
$ b=$a
$ b='$a World'
$ b="$a World"
$ b=$a\ World
$ b=\$a\ World
$ b=$aWorld
$ b=${a}World
$ a=3+6 $ a=$((3+6)) $ a=$((a*6))
$ dir=`pwd` $ dir=$(pwd) $ cd $dir $ d=`date '+%Y.%m.%d'` $ rnd=`jot -r 1 1 10` $ filecount=`ls /bin | wc -l` $ a=1 $ a=$(echo 30/7 | bc -l)
$ echo -n "Enter Name: "; read a; echo Hello "$a"
$ a=/bin/c*
$ i=sip.conf.sample
$ echo $i
$ echo ${i}
$ echo ${i%.sample}
$ i='GET /index.html'
$ echo ${i#GET /}
$ PHONE=''
$ unset PHONE
$ PHONE=84951111111
$ echo ${PHONE:-84959999999}
bash$ PHONE=+74951234569
bash$ echo ${PHONE: -10}
set a b c echo $3 $2 $1 $*
$ unset CLICOLOR