Bash 9 | 1/7nic825.la.coocan.jp/ubuntu/herestring-180426-03.pdf3 Pocket Bash [hide] 1. 2. 3. 4. 5.exec 6. 7. 8. ( ) 9. (exitcode) 1. UNIX OS > ( ) >> LAN IP 6 (Linux/Windows) Teraterm

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1/7Bash 9 | ...

2018/04/26https://orebibou.com/2016/02/%E8%A6%9A%E3%81%88%E3%81%A6%E3%82%...

/dev/null

/dev/pts/1

2.

read

[root@test-node ~]# cat /work/command /etc [root@test-node ~]# read -r line < /work/command ;echo $line /etc

3.

cat

[root@test-node ~]# cat << EOF > /work/test_red.txt > 1234 > 5678 > 90 > EOF [root@test-node ~]# cat /work/test_red.txt 1234 5678 90

EOFEOF

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1> # ( ) 2> # &> #

1 echo " " > /dev/pts/1

1 3>&1 1>&2 2>&3

1 < #

123

<< EOF......EOF

123

<< EOF......EOF

2/7Bash 9 | ...


4.

cat echo( )

[root@test-node ~]# cat <<< "This Server is $(hostname)." This Server is test-node.

5.exec

exec (fork )

( PS1)

●

[root@test-node ~]# cat /work/test_sh.sh exec 2>/tmp/error_test greew grep 'aaa' /etc/hogeghogege [root@test-node ~]# sh /work/test_sh.sh [root@test-node ~]# cat /tmp/error_test /work/test_sh.sh: 2: greew: grep: /etc/hogeghogege:

●

[root@test-node ~]# exec 3</etc/fstab [root@test-node ~]# grep "" <&3 # # /etc/fstab # Created by anaconda on Sun Jan 3 08:46:04 2016 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / xfs defaults 0 0 UUID=461b7464-714d-4a8b-9f63-19fe0482887f /boot xfs defaults 0 0 /dev/mapper/centos-home /home xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 [root@test-node ~]# grep "" <&3 [root@test-node ~]#</pre>

●

[root@test-node ~]# exec 3>/tmp/3teest [root@test-node ~]# echo "aaaaaaaa" >&3

1 <<< " "

1 exec 2> #

1 exec 3<

1 exec 3>

GPUDC

SSH ...orebibou.com

...orebibou.com

Exc...orebibou.com

find...

orebibou.com

sed...

orebibou.com

sed...

orebibou.com

...orebibou.com

Linux...

orebibou.com

xargs...

orebibou.com

Linux/Mac...

orebibou.com

3/7Bash 9 | ...


[root@test-node ~]# cat /tmp/3teest aaaaaaaa

●

[root@test-node ~]# exec 3<>/tmp/3test [root@test-node ~]# echo "aaaaaaaa" >&3 [root@test-node ~]# [root@test-node ~]# exec 3<>/tmp/3test [root@test-node ~]# grep "" <&3 aaaaaaaa

●

[root@test-node ~]# exec 3<> /dev/tcp/127.0.0.1/22 [root@test-node ~]# echo $? 0 [root@test-node ~]# exec 3<> /dev/tcp/127.0.0.1/23 -bash: connect: -bash: /dev/tcp/127.0.0.1/23: [root@test-node ~]# echo $? 1

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() {}

[root@test-node ~]# (echo aaa;echo bbb) > /tmp/aaa123 [root@test-node ~]# cat /tmp/aaa123 aaa bbb [root@test-node ~]# [root@test-node ~]# { echo aaa;echo bbb; } > /tmp/aaa123_2 [root@test-node ~]# cat /tmp/aaa123_2 aaa bbb

7.

1 exec 3<>

12

exec 3<> /dev/tcp/ / # tcpexec 3<> /dev/udp/ / # udp

Google

12

( 1; 2;...) > # { 1; 2;...; } > #

4/7Bash 9 | ...


|( )

( Process Substitution )

[root@test-node ~]# cat /work/test_sort1 2 dddddd 1 aaaaaa 5 bbbbbb 6 gfgfgr [root@test-node ~]# cat /work/test_sort2 6 gfgfgr 4 bbbbbb 1 aaaaaa 3 cfffff [root@test-node ~]# sort /work/test_sort1 1 aaaaaa 2 dddddd 5 bbbbbb 6 gfgfgr [root@test-node ~]# sort /work/test_sort2 1 aaaaaa 3 cfffff 4 bbbbbb 6 gfgfgr [root@test-node ~]# diff <(sort /work/test_sort1) <(sort /work/test_sort2) 2,3c2,3 < 2 dddddd < 5 bbbbbb --- > 3 cfffff > 4 bbbbbb

8. ( )

UNIX OS

[root@test-node ~]# grep "" /work/hostname_* /work/hostname_aaa_000.txt:aaa_000 /work/hostname_aaa_001.txt:aaa_001 /work/hostname_aaa_002.txt:aaa_002 /work/hostname_aaa_003.txt:aaa_003 /work/hostname_aaa_004.txt:aaa_004 /work/hostname_aaa_005.txt:aaa_005 /work/hostname_bbb_000.txt:aaa_000 /work/hostname_bbb_001.txt:aaa_001 /work/hostname_bbb_002.txt:aaa_002 /work/hostname_bbb_003.txt:aaa_003 /work/hostname_bbb_004.txt:aaa_004 /work/hostname_bbb_005.txt:aaa_005 [root@test-node ~]# grep "" /work/hostname_* | grep aaa_000 /work/hostname_aaa_000.txt:aaa_000 /work/hostname_bbb_000.txt:aaa_000

bash4.1

[root@test-node ~]# grep "" /work/hostneme_* grep: /work/hostneme_*: [root@test-node ~]# [root@test-node ~]# grep "" /work/hostneme_* | sed 's/work/aaaa/g' grep: /work/hostneme_*: [root@test-node ~]#

1 <( )

1 <( ) <( )

1 |

1 |&

5/7Bash 9 | ...


3 Pocket

AnsiWeather…

aproposman

a…

CentOS 7 Samba4Active Directory Domain Controller (AD DC)

Windows…

[root@test-node ~]# grep "" /work/hostneme_* |& sed 's/work/aaaa/g' grep: /aaaa/hostneme_*:

9. (exitcode)

echo $?

exitcode bash PIPESTATUS

[root@test-node ~]# grep "" /euc |& sed 's/euc/aaa/g' grep: /aaa: [root@test-node ~]# echo ${PIPESTATUS[@]} 2 0

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Bash 9 | 1/7nic825.la.coocan.jp/ubuntu/herestring-180426-03.pdf3 Pocket Bash [hide] 1. 2. 3. 4. 5.exec 6. 7. 8. ( ) 9. (exitcode) 1. UNIX OS > ( ) >> LAN IP 6 (Linux/Windows) Teraterm