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minor fixes, updates

- signed-off-by: trimstray <trimstray@gmail.com>
pull/1/head
trimstray 4 years ago
parent
commit
0be3ddfa01
1 changed files with 35 additions and 21 deletions
  1. +35
    -21
      README.md

+ 35
- 21
README.md View File

@@ -389,7 +389,11 @@ some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)
###### List of commands you use most often

```bash
history | awk '{ a[$2]++ } END { for(i in a) { print a[i] " " i } }' | sort -rn | head
history | \
awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | \
grep -v "./" | \
column -c3 -s " " -t | \
sort -nr | nl | head -n 20
```

###### Empty a file (truncate to 0 size)
@@ -771,7 +775,10 @@ ___
###### Show 20 biggest directories with 'K M G'

```bash
du | sort -r -n | awk '{split("K M G",v); s=1; while($1>1024){$1/=1024; s++} print int($1)" "v[s]"\t"$2}' | head -n 20
du | \
sort -r -n | \
awk '{split("K M G",v); s=1; while($1>1024){$1/=1024; s++} print int($1)" "v[s]"\t"$2}' | \
head -n 20
```

___
@@ -1359,8 +1366,8 @@ __EOF__

```bash
server> while : ; do \
(echo -ne "HTTP/1.1 200 OK\r\nContent-Length: $(wc -c <index.html)\r\n\r\n" ; cat index.html;) \
| nc -l -p 5000 \
(echo -ne "HTTP/1.1 200 OK\r\nContent-Length: $(wc -c <index.html)\r\n\r\n" ; cat index.html;) | \
nc -l -p 5000 \
; done
```

@@ -1394,10 +1401,11 @@ mkfifo -m 0600 "$_back" "$_sent" "$_recv"

sed "s/^/=> /" <"$_sent" &
sed "s/^/<= /" <"$_recv" &
nc -l -p "$_listen_port" <"$_back" \
| tee "$_sent" \
| nc "$_bk_host" "$_bk_port" \
| tee "$_recv" >"$_back"

nc -l -p "$_listen_port" <"$_back" | \
tee "$_sent" | \
nc "$_bk_host" "$_bk_port" | \
tee "$_recv" >"$_back"
```

```bash
@@ -1518,9 +1526,9 @@ lsof -u username -a +D /etc
###### Show 10 Largest Open Files

```bash
lsof / \
| awk '{ if($7 > 1048576) print $7/1048576 "MB" " " $9 " " $1 }' \
| sort -n -u | tail | column -t
lsof / | \
awk '{ if($7 > 1048576) print $7/1048576 "MB" " " $9 " " $1 }' | \
sort -n -u | tail | column -t
```

___
@@ -1530,7 +1538,13 @@ ___
###### Graph # of connections for each hosts

```bash
netstat -an | grep ESTABLISHED | awk '{print $5}' | awk -F: '{print $1}' | grep -v -e '^[[:space:]]*$' | sort | uniq -c | awk '{ printf("%s\t%s\t",$2,$1) ; for (i = 0; i < $1; i++) {printf("*")}; print "" }'
netstat -an | \
grep ESTABLISHED | \
awk '{print $5}' | \
awk -F: '{print $1}' | \
grep -v -e '^[[:space:]]*$' | \
sort | uniq -c | \
awk '{ printf("%s\t%s\t",$2,$1) ; for (i = 0; i < $1; i++) {printf("*")}; print "" }'
```

###### Monitor open connections for specific port including listen, count and sort it per IP
@@ -1607,15 +1621,15 @@ ___

```bash
AS="AS32934"
whois -h whois.radb.net -- "-i origin ${AS}" \
| grep "^route:" \
| cut -d ":" -f2 \
| sed -e 's/^[ \t]//' \
| sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 \
| cut -d ":" -f2 \
| sed -e 's/^[ \t]/allow /' \
| sed 's/$/;/' \
| sed 's/allow */subnet -> /g'
whois -h whois.radb.net -- "-i origin ${AS}" | \
grep "^route:" | \
cut -d ":" -f2 | \
sed -e 's/^[ \t]//' | \
sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 | \
cut -d ":" -f2 | \
sed -e 's/^[ \t]/allow /' | \
sed 's/$/;/' | \
sed 's/allow */subnet -> /g'
```

###### Resolves domain name from dns.google.com with curl and jq


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