Bash

Recovered from the older tannerjc.net wiki snapshot dated January 23, 2016.

• make for loops ignore spaces in input

IFS='\n'
for BLAH in `cat filename`; do

IFS=$(echo -e \n\r)

one liners

for loop

for i in $(seq 1 9); do ssh -f server.example.com logger hi; done;

for i in `ls|xargs`; do bzip2 -d $i; done;

date formatting

$ date +%F-%H-%M-%S.pcap
2011-01-28-11-25-13.pcap

unique use cases

• multiple zip files
• zip files have spaces
• each with files of similar naming scheme
• all unzip to current dir

take care of spaces in zip files

#!/bin/bash
SAVEIFS=$IFS
IFS=$(echo -en \n\b)
for f in *
do
  echo $f
done
IFS=$SAVEIFS

for f in *; do  mkdir $f-dir; done

unzip archives inside the newly created dirs of same root name

for f in *.zip; do unzip $f -d $f-dir; done