Time | Kevin Deldycke

Text replacement:

sed 's/string to replace/replacement string/g' original-file.txt > new-file.txt

Replace all occurrences of str1 by str2 in all files below the /folder path:

find /folder -xdev -type f -print -exec sed -i 's/str1/str2/g' "{}" \;

Same as above but ignore all content of .svn folders and .zip files:

find /folder -xdev -type f -not -regex ".*\/\.svn\/.*" -not -iname "*\.zip" -print -exec sed -i 's/str1/str2/g' "{}" \;

In place charset transcoding:
```
recode utf-8..latin-1 utf8text.txt
```
Remove all accented characters in a string (thanks to Matthieu for the tip):
```
echo "éÈça-$" | iconv -t ASCII//translit
```
Get the date of last week:
```
date +"%Y-%m-%d" -d last-week
```
Get the current date in english:
```
env LC_TIME=en date +"%a %b %d %Y"
```
Get the number of seconds since epoch:
```
date +%s
```
Convert back epoch time to human-readable date:
```
date --date=@1234567890
```

Merge 2 PDF documents:

pdftk doc1.pdf doc2.pdf cat output newdoc.pdf

Same as above, but for all PDFs of the current folder. This also have the nice side effect of removing all DRMs :
```
gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=bigfile.pdf ./*
```
VIM: no autoindent on paste.
a list of sed one-liners.

Kevin Deldycke