ckh2023

ÕªÒª£º 1. ³£ÓÃÃüÁî # 1. ²é¿´Óм¸¸öÆô¶¯µÄÐéÄâ»ú [root@stream9 ~]# virsh list Id Name State # 2. ²é¿´ËùÓÐÐéÄâ»ú [root@stream9 ~]# virsh list --all Id Name State # 3. ²é¿´Ä£°åÐéÄâ»úµÄÀàÐ͸ñʽ cd ÔĶÁÈ«ÎÄ

ÕªÒª£º 1.Éú³ÉÃÜÔ¿¶Ô [root@centos79 ~]# ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphras ÔĶÁÈ«ÎÄ

ÕªÒª£º Ò».´òÓ¡Èý½Ç 1.ͼһ #!/bin/bash # 1 # 22 # 333 # 4444 # 55555 # 666666 # 7777777 # 88888888 # 999999999 for i in $(seq 9); do for ((j = 1; j <= i; j++)); do e ÔĶÁÈ«ÎÄ

ÕªÒª£º 1.shell ÑÕÉ«¿ØÖÆ #!/bin/bash # ×ÖÌåÑÕÉ« # ÖØÖÃ=0 # ºÚÉ«=30 # ºìÉ«=31 # ÂÌÉ«=32 # ***=33 # À¶É«=34 # Ñóºì=35 # ÇàÉ«=36 # °×É«=37. # ±³¾°ÑÕÉ« # ÖØÖÃ=0 # ºÚÉ«=40 # ºìÉ«=41 # ÂÌÉ«=42 # ***=4 ÔĶÁÈ«ÎÄ

ÕªÒª£º 1.Ó÷¨ 1 #!/bin/bash arr=(aa bb cc) for i in ${arr[@]}; do echo $i done 2.Ó÷¨ 2 #!/bin/bash for j in a b c d; do echo $j done 3.Ó÷¨ 3 #!/bin/bash for m in ÔĶÁÈ«ÎÄ

ÕªÒª£º 1. Êý×é root@bk:~# arr=(aa bb cc) root@bk:~# echo ${arr[@]} aa bb cc root@bk:~# echo ${arr[0]} aa root@bk:~# echo ${arr[2]} cc # ±éÀúÐòºÅ root@bk:~# for i i ÔĶÁÈ«ÎÄ

ÕªÒª£º Èý¸öÊý×ÖÅÅÐò !/bin/bash read -p "ÇëÊäÈëÒ»¸öÕûÊý:" num1 read -p "ÇëÊäÈëÒ»¸öÕûÊý:" num2 read -p "ÇëÊäÈëÒ»¸öÕûÊý:" num3 #²»¹ÜË­´ó˭С,×îºó¶¼´òÓ¡ echo "$num1,$num2,$num3" #num1 ÖÐÓÀÔ¶´æ×îСµÄÖµ,num2 ÖÐ ÔĶÁÈ«ÎÄ

ÕªÒª£º 1. Âß¼­»òÓë·Ç # Á¬×ÅÓà root@bk:~# abc="" root@bk:~# [ -z $abc ] && echo "¿Õ" || echo "·Ç¿Õ" ¿Õ root@bk:~# abc="123" root@bk:~# [ -z $abc ] && echo "¿Õ" || echo "·Ç¿Õ ÔĶÁÈ«ÎÄ

ÕªÒª£º ²é¿´ÐéÄâ»úϵͳÐÅÏ¢ # ²é¿´Ó²ÅÌÐÅÏ¢ root@bk:~/ckh# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sr0 11:0 1 198.4M 0 rom vda 254:0 0 100G 0 disk ©¸©¤vda1 254:1 0 100G 0 ÔĶÁÈ«ÎÄ

ÕªÒª£º 1. ¼Ó¼õ³Ë³ýÈ¡Óà # ·½·¨1 root@bk:~/ckh# expr 1 + 1 2 root@bk:~/ckh# expr 100 - 1 99 root@bk:~/ckh# expr 2 * 2 4 root@bk:~/ckh# expr 9 / 3 3 root@bk:~/ckh# expr ÔĶÁÈ«ÎÄ