Chapter 4 More bash shell Commands
1. ps
ps -ef
2. top
3. kill 3940
kill -s HUP 3940
killall http*
4. df
df -h
5. du
du -h
6. sort
sort -n
sort -r
sort -t ":" -k 3 -n
7. grep
grep three file1
grep -v
grep -n
grep -c
8. tar
tar -cvf test.tar test1/ test2/
tar -xvf test.tar
tar -tf test.tar
Chapter 6: Using Linux Environment Variables
$mytest=(one two three four five)
$ echo ${mytest[1]}
$ echo ${mytest[*]}
$ mytest[2]=seven
$ unset mytest[2]
$ unset mytest
Chapter11: Basic Script Building
echo -n
testing=`date`
testing=$(date)
date +%y%m%d
$ wc << EOF
> test string1
> test string2
> EOF
$ expr 2 + 3
$ expr 2 * 3
$var1=$[1+4]
$var1=$(echo "scale=4;3.44/5" | bc)
var5=$(bc << EOF
scale=4
a1 = ($var1 * $var2)
b1 = ($var3 * $var4)
a1 + b1
EOF
)