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add awk, sed and system

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onceupon 2016-09-01 17:24:27 +08:00 committed by GitHub
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commit 81bc838790
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@ -273,6 +273,11 @@ sed ':a;N;$!ba;s/\n//g'
sed -n '10,33p' <filename
```
#####change delimiter
```bash
sed 's=/=\\/=g'
```
#Awk
[[back to top](#handy-bash-oneliner-commands-for-tsv-file-editing)]
@ -443,6 +448,18 @@ detail here:　http://stackoverflow.com/questions/33408762/bash-turning-single-c
awk '{split($2,a,",");for(i in a)print $1"\t"a[i]}' file
```
#####sum up a file
```bash
awk '{s+=$1} END {print s}' filename
```
#####print field start with string (e.g Linux)
```bash
awk '$1 ~ /^Linux/'
```
##Xargs
[[back to top](#handy-bash-oneliner-commands-for-tsv-file-editing)]
@ -1540,6 +1557,10 @@ cat /proc/sys/kernal/pid_max
```bash
ulimit -u
```
#####which ports are listening for TCP connections from the network
```bash
nmap -sT -O localhost
```
=-=-=-=-=-A lot more coming!! =-=-=-=-=-=-=-=-=-=waitwait-=-=-=-=-=-=-=-=-=-