LinuxCamp | Кирилл Жильников

$ sort /usr/share/dict/words | head -n2 &
[1] 81089 
$

$ sort /usr/share/dict/words | head -n2 &
[1] 81089 
$A
A's

$ sort /usr/share/dict/words | head -n2 > /tmp/results &

$ cat /tmp/results
A
A's

$ cat &
[1] 82455
[1]+ Stopped cat

$ fg
cat
Hello world!
Hello world!

$ sleep 10 & sleep 20 & sleep 30 &

$ jobs  
[1]  Running sleep 10 &  
[2]- Running sleep 20 &  
[3]+ Running sleep 30 &

$ fg %2  
sleep 20

$ nm-applet
^Z  
[1]+ Stopped nm-applet

$ bg  
[1]+ nm-applet & 

$ jobs  
[1]+ Running nm-applet

$ jobs  
[1]- Stopped sleep 200  
[2]+ Running sleep 100 &

$ bg %1  
[1]+ sleep 200 &

$ kill %1  
[1]+ Terminated sleep 200

$ kill -9 %1
[1]+ Killed sleep 200

$ wc -c file.txt & 
[1] 74931
$

[1]+  Done                    wc -c file.txt

[1]+ Exit 1 wc -c file.txt

$ nm-applet & wc -c file.txt &
[1] 28839
[2] 28840

[4]+  Running  nm-applet && wc -c file.txt &

$ cat file.txt | grep "word" | sort | uniq | tr 'a-z' 'A-Z' | wc -l > result.txt &

[5]+  Running  cat file.txt | grep --color=auto "word" ... &

Название: Зеркала
Исполнитель: Лепс
Острые углы, нервы, суета

$ grep -l "Лепс" *.txt
song1.txt
song2.txt

$ mkdir leps
$ mv song1.txt leps
$ mv song2.txt leps

$ mv $(grep -l "Лепс" *.txt) leps

$ mv song1.txt song2.txt leps

переменная=$(команда)

status=$(ls ./ 2>/dev/null | wc -l)

if [ "$status" -gt 0 ]; then
    echo "В директории есть $status файлов"
else
    echo "Директория пуста или не существует"
fi

$ chmod +x script.sh
$ ./script.sh
В директории есть 66 файлов

$ pwd
$ /home/xoadmin/photo and video
$ chmod 777 $(pwd)

chmod: cannot access '/home/xoadmin/photo': No such file or directory

chmod: cannot access 'and': No such file or directory

chmod: cannot access 'video': No such file or directory

$ chmod 777 "$(pwd)"

$ echo $(ls)
adduser.conf alsa alternatives apache2 apg.conf apparmor

$ echo "$(ls)"
adduser.conf
alsa
alternatives

$ cd dir
$ touch new.txt

$ cd dir && touch new.txt

$ git add . && git commit -m"fixed a bug" && git push

$ cd dir || mkdir dir

cd dir || exit 1

$ cd dir || mkdir dir && cd dir || echo "I failed"

$ sleep 7200; cp -a ~/files /mnt/backup_drive

$ mv file1 file2; mv file2 file3; mv file3 file4

# Код возврата команды «mv file3 file4»
$ echo $?
0

$ echo My name is $USER and my files are in $HOME

My name is xoadmin and my files are in /home/xoadmin

$ echo ch*ter9
chapter9

name=value

$ work=$HOME/Projects

$ cd $work
$ pwd 
/home/xoadmin/Projects

$ cp myfile $work 
$ ls $work
Myfile

# Метод 1
$ mv dir1/*.txt dir2 

# Метод 2
$ FILES="file1.txt file1.txt"
$ mv dir1/$FILES dir2

$ echo dir1/*.txt
dir1/file1.txt dir1/file2.txt

$ mv dir1/file1.txt dir1/file2.txt dir2

$ echo dir1/$FILES
dir1/file1.txt file2.txt

$ mv dir1/file1.txt file2.txt dir2

/bin/mv: cannot stat 'file2.txt': No such file or directory

$ ls /usr/lib | grep nma 
libnma.so.0 
libnma.so.0.0.0

ls (STDOUT) -> grep (STDIN) -> grep (STDOUT)

#include <unistd.h>

int pipe(int pipefd[2]);

$ ls -l /usr/lib
drwxrwxr-x ... 4kstogram
drwxr-xr-x ... NetworkManager

$ ls -l /usr/lib | cut -c1
d 
d
d
-
-
-

$ ls -l /usr/lib | cut -c1 | grep d
d
d
d

$ ls -l /usr/lib | cut -c1 | grep d | wc -l
145

$ tr 'a-z' 'A-Z'
hello
HELLO

$ cat animals.txt
1 retriever
2 badger

$ tr 'a-z' 'A-Z' < animals.txt
1 RETRIEVER
2 BADGER

$ cat << EOF
> Сurrent user: $(whoami)
> Status: sysadmin
> EOF
Сurrent user: parallels
Status: sysadmin

$ cat << EOF > config.conf 
[settings] 
host=localhost 
port=8080 
debug=true 
EOF

$ mysql -u root -p << EOF
CREATE DATABASE my_database;
USE my_database;
...
EOF

$ date > date.txt
$ cat date.txt 
Sat Dec 14 20:50:46 MSK 2024

$ date >> date.txt 
$ cat date.txt 
Sat Dec 14 20:50:46 MSK 2024 
Sat Dec 14 20:51:40 MSK 2024

$ find /etc -type f > ~/results.txt 
find: ‘/etc/ssl/private’: Permission denied

$ find /etc -type f > ~/results.txt 2> ~/errors.txt

$ cat ~/errors.txt 
find: ‘/etc/ssl/private’: Permission denied 

$ find /etc -type f 2> /dev/null

$ ls > /tmp/lsdata 2>&1
$ ls &> /tmp/lsdata

$ cd /proc/551981/fd
$ ls
0  1  103  2  43

$ cat
Hello bro
Hello bro

$ echo $USER 
parallels

$ rm example.txt
rm: example.txt: No such file or directory

$ rm example.txt
rm: example.txt: No such file or directory

$ echo $?
1