打印两个变量输出使用shell脚本

Question

这是我的脚本

fdisk -l > /tmp/fdisk.txt 
DISK_NAME=$(cat /tmp/fdisk.txt | grep -w "Disk /dev" | awk '{print $2}' | cut -d ':' -f1) 
echo disk name are : $DISK_NAME 
DISK_SIZE=$(cat /tmp/fdisk.txt | grep -w Disk |grep -v "identifier" | awk '{print $3}') 

HEAD=$(cat /tmp/fdisk.txt | grep "heads" | awk '{print $1}') 
SECTOR=$(cat /tmp/fdisk.txt | grep -w "sectors/track" | awk '{print $3}') 
CYLINDER=$(cat /tmp/fdisk.txt | grep -w "cylinders" | awk '{print $5}') 
TOTAL=$(cat /tmp/fdisk.txt | grep -w "total" | awk '{print $8}') 
echo disk size are : $DISK_SIZE 
echo Head are : $HEAD 
echo Sector are : $SECTOR 
echo Cylinder are : $CYLINDER 
echo Total are : $TOTAL 

输出继电器是：

Disk /dev/mapper/openstackvm00--vg-root doesn't contain a valid partition table 
Disk /dev/mapper/openstackvm00--vg-swap_1 doesn't contain a valid partition table 

disk name are : /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/mapper/openstackvm00--vg-root /dev/mapper/openstackvm00--vg-swap_1 
disk size are : 10.7 32.2 8589 10.7 40.5 1073 
Head are : 255 64 86 255 255 255 
Sector are : 63 51 1 63 63 63 
Cylinder are : 1305 19275 195083 1305 4928 130 
Total are : 20971520 62914560 16777216 20971520 79183872 2097152 

在此输出，我不想前两行

Disk /dev/mapper/openstackvm00--vg-root doesn't contain a valid partition table 
Disk /dev/mapper/openstackvm00--vg-swap_1 doesn't contain a valid partition table 

而我想要这样的输出

Device Name Size Head Sector Cylinder Total 
/dev/sda  10 255  63  1305 20971520 
/dev/sdb  -- --  --  --  --- 
/dev/sdc  -- --  -- - -- -  -- 

我该如何得到这样的结果？

fdisk -l输出重定向到Fdisk.txt文件输出。猫/tmp/fdisk.txt文件 ＃猫/tmp/fdisk.txt

Disk /dev/sda: 10.7 GB, 10737418240 bytes 
    255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes/512 bytes 
    I/O size (minimum/optimal): 512 bytes/512 bytes 
    Disk identifier: 0x0005b9c4 

    Device Boot  Start   End  Blocks Id System 
    /dev/sda1 *  2048  499711  248832 83 Linux 
    /dev/sda2   501758 20969471 10233857 5 Extended 
    /dev/sda5   501760 20969471 10233856 8e Linux LVM 

    Disk /dev/sdb: 32.2 GB, 32212254720 bytes 
    64 heads, 51 sectors/track, 19275 cylinders, total 62914560 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes/512 bytes 
    I/O size (minimum/optimal): 512 bytes/512 bytes 
    Disk identifier: 0xe3162587 

    Device Boot  Start   End  Blocks Id System 
    /dev/sdb1   2048 62914559 31456256 8e Linux LVM 

    Disk /dev/sdc: 8589 MB, 8589934592 bytes 
    86 heads, 1 sectors/track, 195083 cylinders, total 16777216 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes/512 bytes 
    I/O size (minimum/optimal): 512 bytes/512 bytes 
    Disk identifier: 0xa4cdf171 

    Device Boot  Start   End  Blocks Id System 
    /dev/sdc1   2048 16777215  8387584 83 Linux 

    Disk /dev/sdd: 10.7 GB, 10737418240 bytes 
    255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes/512 bytes 
    I/O size (minimum/optimal): 512 bytes/512 bytes 
    Disk identifier: 0x3632934a 

    Device Boot  Start   End  Blocks Id System 
    /dev/sdd1   2048 10487807  5242880 83 Linux 
    /dev/sdd2  10487808 14682111  2097152 8e Linux LVM 
    /dev/sdd3  14682112 15706111  512000 83 Linux 
    /dev/sdd4  15706112 15910911  102400 83 Linux 

    Disk /dev/mapper/openstackvm00--vg-root: 40.5 GB, 40542142464 bytes 
    255 heads, 63 sectors/track, 4928 cylinders, total 79183872 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes/512 bytes 
    I/O size (minimum/optimal): 512 bytes/512 bytes 
    Disk identifier: 0x00000000 


    Disk /dev/mapper/openstackvm00--vg-swap_1: 1073 MB, 1073741824 bytes 
    255 heads, 63 sectors/track, 130 cylinders, total 2097152 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes/512 bytes 
    I/O size (minimum/optimal): 512 bytes/512 bytes 
    Disk identifier: 0x00000000 

Answer 1

#!/bin/bash 

var1=2,3,4,5 
var2=two,three,four,five 

var1_n=$(echo $var1 | tr "," "\n") 
var2_n=$(echo $var2 | tr "," "\n") 

paste <(echo "$var1_n") <(echo "$var2_n") -d ' ' 

Answer 2

这些

Disk /dev/mapper/openstackvm00--vg-root doesn't contain a valid partition table 
Disk /dev/mapper/openstackvm00--vg-swap_1 doesn't contain a valid partition table 

错误打印到stderr所以你会想stderr重定向到/dev/null到摆脱他们这样的：

fdisk -l 2>/dev/null >/tmp/fdisk.txt 

关于你的主要问题，虽然这在shell中肯定是可行的，但你可能想考虑使用awk来代替。这里有一个例子：

$ cat t.sh 
#!/bin/bash 

awk ' 
BEGIN { FS="[[:space:]:,]+" } 

/contain a valid partition table/ { next } 

/^Disk [/]dev/ { 
     disk=$2 
     a[disk]["size"] = $5/1024/1024/1024 
} 

/heads.+sectors[/]track.+cylinders.+total.+sectors/ { 
     a[disk]["heads"]  = $1 
     a[disk]["sectors"] = $3 
     a[disk]["cylinders"] = $5 
     a[disk]["total"]  = $8 
} 

END { 
     format_header = "%-38s %10s %10s %10s %10s %10s\n" 
     format_row = "%-38s %7.1f GB %10s %10s %10s %10s\n" 
     printf format_header, "Device Name", "Size", "Head", "Sector", "Cylinder", "Total" 
     for (disk in a) { 
       printf format_row, disk, a[disk]["size"], a[disk]["heads"], a[disk]["sectors"], a[disk]["cylinders"], a[disk]["total"] 
     } 
}' fdisk.txt 

实例运行：

$ ./t.sh 
Device Name         Size  Head  Sector Cylinder  Total 
/dev/mapper/openstackvm00--vg-swap_1  1.0 GB  255   63  130 2097152 
/dev/mapper/openstackvm00--vg-root  37.8 GB  255   63  4928 79183872 
/dev/sda         10.0 GB  255   63  1305 20971520 
/dev/sdb         30.0 GB   64   51  19275 62914560 
/dev/sdc         8.0 GB   86   1  195083 16777216 
/dev/sdd         10.0 GB  255   63  1305 20971520 

你甚至可以用进程替换替换fdisk.txt摆脱的临时文件。更换

}' fdisk.txt 

与

}' <(fdisk -l 2>/dev/null) 

请注意，此信息也/proc这也许可以更可靠和可移植的解析下的某处存在（我fdisk输出略有不同，你的）。