Monthly Archive for December, 2006

Published 3 years, 7 months ago. 0 Comments Tags: CLI, linux.

Here is the list of all posts of the “Usefull Commands” theme. If you don’t know what this is all about, please read the introduction.

Published 3 years, 7 months ago. 0 Comments Tags: linux, Mandriva, RPM, rugg.

I’ve build a new RPM of Rugg 0.2.3 for Mandriva 2007. You can find it in my Mandriva repository.

Published 3 years, 7 months ago. 0 Comments Tags: backup, FTP, lftp, linux, python, rdiff-backup, server, web.

Change log:

Use set ftp:list-options -a command to force lftp to download hidden files (like .htaccess and so on).
Use --force parameter to allow auto-deletion of multiple outdated rdiff-backup increments.
Defensive incremental backup policy: keep 32 last backups instead of 32 days of backup.

I also added a debug mode as suggested by Sacha.

Convert several files from a format to another:
```
convert img_*.bmp img_%04d.png
```
Resize images of the current folder to progressive jpeg. Resized images will not be greater than 600×600, but the aspect ratio will be respected:
```
convert -resize 600x600 -sharpen 1 -interlace Line * pict%04d.jpg
```
Remove all metadata of a JPEG file:
```
exiftool -all= image.jpg
```

Published 3 years, 7 months ago. 0 Comments Tags: calendar, CLI, date, epoch, find, linux, pdf, recode, sed, time, VIM.

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.