Shantanu's Blog
Database ConsultantOctober 28, 2024
awk Case Study - 14
1) Download stardict files:
git clone https://github.com/freedict/fd-dictionaries.git2) Download python package to read stardict files:
git clone https://github.com/ilius/pyglossary.git
cd pyglossary/
cp /home/ubuntu/fd-dictionaries/eng-hin/eng-hin.tei .
python3 main.py
# convert eng-hin.tei file to out.txt
Select the first 3 columns:
Change multiple HTML tags to a single pipe | delimiter
and display the first 3 columns
awk '{
gsub(/<[^>]*>/, "|");
gsub(/\|+/, "|");
match($0, /([^|]*\|){3}/);
first_three = substr($0, RSTART, RLENGTH);
print first_three
}' out.txt > test.csv
Labels: awk
October 04, 2024
awk Case Study - 13
I have 2 text files. corpus file is the collection of words and exclude file has all the suffixes. I need to extract the stemmed words after removing all suffixes.
==> exclude.txt <==works
ed
s
ing
ings
==> corpus.txt <==
worked
working
works
tested
tests
find
found
workings
awk -f tst.awk exclude.txt corpus.txt | sort
unmatched find
unmatched found
matched working/s
matched work/ed,ing,s,ings
matched test/ed,s
And the awk script will look something like this...
$ cat tst.awk
{ lineLgth = length($0) }
NR == FNR {
suffixes[$0]
sfxLgths[lineLgth]
next
}
{
base = ""
for ( sfxLgth in sfxLgths ) {
baseLgth = lineLgth - sfxLgth
if ( baseLgth > 0 ) {
sfx = substr($0,baseLgth+1)
if ( sfx in suffixes ) {
base = substr($0,1,baseLgth)
bases2sfxs[base] = bases2sfxs[base] "," sfx
}
}
}
if ( base == "" ) {
print "unmatched", $0
}
}
END {
for ( base in bases2sfxs ) {
sub(/,/,"/",bases2sfxs[base])
print "matched", base bases2sfxs[base]
}
}
September 28, 2024
Firefox and Libreoffice in your browser
Kasm VNC is a modern open source VNC server.
Quickly connect to your Linux server's desktop from any web browser.No client software install required.
1) Firefox using VNC
docker run -d \
--name=firefox \
-e PUID=1000 \
-e PGID=1000 \
-e TZ=Etc/UTC \
-p 3000:3000 \
-p 3001:3001 \
-v /path/to/config2:/config \
--shm-size="1gb" \
--restart unless-stopped \
lscr.io/linuxserver/firefox:latest
2) Libreoffice using VNC
docker run -d \
--name=libreoffice \
--security-opt seccomp=unconfined `#optional` \
-e PUID=1000 \
-e PGID=1000 \
-e TZ=Etc/UTC \
-p 3000:3000 \
-p 3001:3001 \
-v /path/to/config:/config \
--restart unless-stopped \
lscr.io/linuxserver/libreoffice:latest
Labels: aws, docker, firefox, libreoffice, linux tips, usability
September 24, 2024
export to pdf using linux command
You can generate a "pdf" file from Libreoffice writer "odt" file.
File - Export as PDF option is available only if you are using GUIHere is how to convert to pdf using command line.
# vi Dockerfile
FROM ubuntu:latest
RUN apt-get update && \
apt-get install -y libreoffice
WORKDIR /workspace
ENTRYPOINT ["libreoffice", "--headless", "--convert-to", "pdf"]
# docker build -t shantanuo/libreoffice-converter .
run the docker command to convert a file to pdf
# docker run --rm -v .:/workspace shantanuo/libreoffice-converter /workspace/pm_in_paris.odt --outdir /workspace
Labels: docker, libreoffice
September 08, 2024
awk Case Study - 12
Select the first column from the csv file and remove "www". In sql the command ill look something like this...
select replace(column1, 'www', '') from tbl
# cat logs.csv
Origin,Status,Title,ContentType,IP,Country,City,PhoneCode
https://gnu.org,OK,The GNU Operating System and the Free Software Movement,text/html,209.51.188.116,United States,Boston,+1
https://0t1.me,OK,ZeroToOne - Home,text/html,104.21.84.218,Canada,Toronto,+1
# cat myak.txt
#!/usr/bin/awk -f
BEGIN {
FS = ","
OFS = ""
}
function normalize_origin(origin) {
sub(/www./, "", origin) # remove www from the origin.
return origin
}
{
# Ignore the header line.
if(NR == 1) {
next
}
origin = normalize_origin($1)
print origin
}
# awk -f myak.txt < logs.csv
https://gnu.org
https://0t1.me
https://0t1.me/blog/2024/09/01/practical-awk/
Labels: awk
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