Вячеслав

#!/bin/bash
for f in *.docx; do
   7z a -mx9 "${f:0:1}.7z" "$f"
done

sed 's/test:/\n/g' <<< 'fja fjd jkfd
fjdk fjdktest: fjkd jk
1 1 2'

#!/bin/bash
a='text / 2022 / 2021 / text / 2019 / ( 2018)'
a=${a//\/} # удаление /
a=${a// /_} # замена пробелов на _

#!/bin/bash
awk '{print $1}' < file.txt | sort -u | while read a
do
   >spisok-$a.txt
done

#!/bin/bash
for((i = 1; i < 100; ++i)); do
   a=`printf "%02i" $i`
   ffmpeg -i "name$a.mp4" -i "name$a.aac" "out$a.mp4"
done

find -type f -name '*_*' | xargs -n1 bash -c 'mv "$0" "${0//_/ }"'

#!/bin/bash
DEBIAN_FRONTEND=noninteractive apt install mysql-server -y