updated one-liners

- signed-off-by: trimstray <trimstray@gmail.com>
This commit is contained in:
trimstray 2018-07-03 09:26:35 +02:00
parent c67b5d81b7
commit fb91f7ee88

118
README.md
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@ -250,6 +250,9 @@ performance of any of your sites from across the globe.<br>
* [terminal](#tool-terminal) * [terminal](#tool-terminal)
* [mount](#tool-mount) * [mount](#tool-mount)
* [fuser](#tool-fuser) * [fuser](#tool-fuser)
* [ps](#tool-ps)
* [find](#tool-find)
* [diff](#tool-diff)
- **[HTTP/HTTPS](#http-https)** - **[HTTP/HTTPS](#http-https)**
* [curl](#tool-curl) * [curl](#tool-curl)
* [httpie](#tool-httpie) * [httpie](#tool-httpie)
@ -265,6 +268,8 @@ performance of any of your sites from across the globe.<br>
* [netstat](#tool-nestat) * [netstat](#tool-nestat)
- **[Programming](#programming)** - **[Programming](#programming)**
* [awk](#tool-awk) * [awk](#tool-awk)
* [sed](#tool-sed)
* [grep](#tool-grep)
<a name="system"><b>System</b></a> <a name="system"><b>System</b></a>
@ -276,12 +281,18 @@ performance of any of your sites from across the globe.<br>
disown -a && exit disown -a && exit
``` ```
###### Drop shell history ###### Exit without saving shell history
```bash ```bash
kill -9 $$ kill -9 $$
``` ```
###### Pipe stdout and stderr to separate commands
```bash
some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)
```
###### List of commands you use most often ###### List of commands you use most often
```bash ```bash
@ -307,6 +318,12 @@ vim scp://user@host//etc/fstab
``` ```
___ ___
###### Create a directory and change into it at the same time
```bash
mkd () { mkdir -p "$@" && cd "$@"; }
```
##### Tool: [mount](https://curl.haxx.se) ##### Tool: [mount](https://curl.haxx.se)
###### Mount a temporary ram partition ###### Mount a temporary ram partition
@ -328,6 +345,42 @@ ___
fuser -k filename fuser -k filename
``` ```
___
##### Tool: [ps](https://curl.haxx.se)
###### Show a 4-way scrollable process tree with full details
```bash
ps awwfux | less -S
```
___
##### Tool: [find](https://curl.haxx.se)
###### Find files that have been modified on your system in the past 60 minutes
```bash
find / -mmin 60 -type f
```
###### Find all files larger than 20M
```bash
find / -type f -size +20M
```
___
##### Tool: [diff](https://curl.haxx.se)
###### Compare two directory trees
```bash
diff <(cd directory1 && find | sort) <(cd directory2 && find | sort)
```
<a name="http-https"><b>HTTP/HTTPS</b></a> <a name="http-https"><b>HTTP/HTTPS</b></a>
##### Tool: [curl](https://curl.haxx.se) ##### Tool: [curl](https://curl.haxx.se)
@ -398,6 +451,16 @@ ssh user@host cat /path/to/remotefile | diff /path/to/localfile -
ssh -t reachable_host ssh unreachable_host ssh -t reachable_host ssh unreachable_host
``` ```
###### Run command over ssh on remote host
```bash
cat > cmd.txt << __EOF__
cat /etc/hosts
__EOF__
ssh host -l user $(<cmd.txt)
```
___ ___
##### Tool: [linux-dev](https://www.tldp.org/LDP/abs/html/devref1.html) ##### Tool: [linux-dev](https://www.tldp.org/LDP/abs/html/devref1.html)
@ -668,6 +731,8 @@ socat TCP-LISTEN:1234,bind=127.0.0.1,reuseaddr,fork,su=nobody,range=127.0.0.0/8
* `UNIX-CLIENT:<params>` - communicates with the specified peer socket * `UNIX-CLIENT:<params>` - communicates with the specified peer socket
* `filename` - define socket * `filename` - define socket
___
##### Tool: [lsof](http://www.dest-unreach.org/socat/doc/socat.html/) ##### Tool: [lsof](http://www.dest-unreach.org/socat/doc/socat.html/)
###### Show process that use internet connection at the moment ###### Show process that use internet connection at the moment
@ -676,6 +741,18 @@ socat TCP-LISTEN:1234,bind=127.0.0.1,reuseaddr,fork,su=nobody,range=127.0.0.0/8
lsof -P -i -n lsof -P -i -n
``` ```
###### Show process that use specific port number
```bash
lsof -i tcp:443
```
###### Lists all listening ports together with the PID of the associated process
```bash
lsof -Pan -i tcp -i udp
```
**Tool: [netstat](http://www.dest-unreach.org/socat/doc/socat.html/)** **Tool: [netstat](http://www.dest-unreach.org/socat/doc/socat.html/)**
###### Graph # of connections for each hosts ###### Graph # of connections for each hosts
@ -693,3 +770,42 @@ netstat -an | grep ESTABLISHED | awk '{print $5}' | awk -F: '{print $1}' | grep
```bash ```bash
awk '!x[$0]++' filename awk '!x[$0]++' filename
``` ```
###### Exclude multiple columns using AWK
```bash
awk '{$1=$3=""}1' filename
```
___
##### Tool: [sed](http://www.dest-unreach.org/socat/doc/socat.html/)
###### To print a specific line from a file
```bash
sed -n 10p /path/to/file
```
###### Remove a specific line from a file
```bash
sed -i 10d /path/to/file
```
___
##### Tool: [grep](http://www.dest-unreach.org/socat/doc/socat.html/)
###### Search for a "pattern" inside all files in the current directory
```bash
grep -RnisI "pattern" *
fgrep "pattern" * -R
```
###### Remove blank lines from a file and save output to new file
```bash
grep . filename > newfilename
```