The Four musketeers in shell programming

Vim command

Replace:

%s/aaa/bbb/

%s/aaa/bbb/g

Regular Expressions:

^ Opening

$ end

[0-9] Number

[A-z] lowercase

[A-z] capitalization

[^a-z] Non-lowercase

{1,3} 1 to 3 times

. Any single character, except \ r \ n

* 0 times to several times

? 0 times to 1 times

+ 1 times to multiple times

SED command　

Suitable for handling row-related

Replace:

Sed ' s/aaa/bbb/g ' xx.sh

Sed-i ' s/aaa/bbb/g ' xx.sh

Sed ' s//\n/g ' xx.sh

Add a space at the beginning of each line:

Sed ' s/^/&/g ' xx.sh

Add one at the end of each line:

Sed ' s/$/& xiaofan/g ' xx.sh

Locate the row containing Nginx and add the ##### #字符 to his next line:

Sed '/nginx/a ###### ' xx.sh

Locate the row containing Nginx and add ##### #字符 to his previous line:

Sed '/nginx/i ###### ' xx.sh

Match a row and print:

Sed-n '/nginx/p ' xx.sh

Print 1--3 Line:

Sed-n ' 1,3p ' xx.sh

Print the first and last line:

Sed-n ' 1p; $p ' xx.sh

grep command

Filtration (combined with regular use)

-E using Perl regular

-V does not match

-N Print line number

-O outputs only matches to content instead of entire rows

-I ignores case

Match the line of the AA string:

grep "AA" xx.sh

Matches the line of the AA string and the top 2 lines:

Grep-b2 "AA" xx.sh

Matches the line of the AA string and the next 2 lines:

GREP-A2 "AA" xx.sh

Matches the line of the AA string and the top and bottom 2 lines:

Grep-2 "AA" xx.sh

awk command

Awk-f ' {print ($)} ' xx.sh

awk ' $3>90 {print $} ' xx.sh

awk ' {if ($1== "Boo" | | $3==84) print $} ' xx.sh

Netstat-an|awk '/^tcp/{++s[$NF]} END {for (i in S) print S[i],i} '

-F Specify delimiter

Full line

First column

$ second Column

$NF last Column

$NR

How many columns NF has

NR number of rows that have been read

Find command

Find./-maxdepth 1-name "*.sh"

Find./-mandepth 1-type f-name "*.sh"

Modified 7 days ago:

Find./-mtime +7

Modified in the same day:

Find./-mtime-1

Find files larger than 20M in the first layer of the current directory:

Find./-maxdepth 1-size +20m-type F

Locate and perform subsequent actions:

Find./-mtime +7 | Xargs RM-RF

Find./-mtime +7 | Xargs RM-RF \;

Find./-mtime +7-exec RM-RF {} \;

Find./-mtime +7-exec cp {}/tmp/\;

The Four musketeers in shell programming