标签：xargs
xargs用法示例
实例文件内容：
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# cat 1.log
oraclelinux-release.x86_64 6:6Server-6.0.2 redhat-release-server.x86_64 1:6Server-6.6.0.2.0.1.el6
DeviceKit-power.x86_64 0:014-3.el6 NetworkManager.x86_64 1:0.8.1-75.el6 NetworkManager-gnome.x86_64 1:0.8.1-75.el6 VirtualBox-4.3.x86_64 0:4.3.28_100309_el6-1
acpid.x86_64 0:1.0.10-2.1.el6 aic94xx-firmware.noarch 0:30-2.el6 akonadi.x86_64 0:1.2.1-3.el6 alsa-plugins-pulseaudio.x86_64 0:1.0.21-3.el6
authconfig-gtk.x86_64 0:6.1.12-19.el6 autofs.x86_64 1:5.0.5-109.0.1.el6_6.1 b43-openfwwf.noarch 0:5.2-4.el6 bfa-firmware.noarch 0:3.2.23.0-2.el6
biosdevname.x86_64 0:0.5.1-1.el6 bluez.x86_64 0:4.66-1.el6 brasero-nautilus.x86_64 0:2.28.3-6.el6 certmonger.x86_64 0:0.75.13-1.el6
cifs-utils.x86_64 0:4.8.1-19.el6 compiz.x86_64 0:0.8.2-24.el6 compiz-gnome.x86_64 0:0.8.2-24.el6 control-center.x86_64 1:2.28.1-39.el6
control-center-extra.x86_64 1:2.28.1-39.el6 cpuspeed.x86_64 1:1.5-20.0.1.el6_4 crda.x86_64 0:1.1.3_2014.06.13-1.el6 cronie.x86_64 0:1.4.4-12.el6
cronie-anacron.x86_64 0:1.4.4-12.el6 crontabs.noarch 0:1.10-33.el6 cryptsetup-luks.x86_64 0:1.2.0-11.el6 cryptsetup-luks-libs.x86_64 0:1.2.0-11.el6
cups.x86_64 1:1.4.2-67.el6 cyrus-sasl.x86_64 0:2.1.23-15.el6_6.2 desktop-effects.x86_64 0:0.8.4-7.el6 device-mapper.x86_64 0:1.02.90-2.el6_6.1
device-mapper-event.x86_64 0:1.02.90-2.el6_6.1 device-mapper-event-libs.x86_64 0:1.02.90-2.el6_6.1 device-mapper-libs.x86_64 0:1.02.90-2.el6_6.1 dhclient.x86_64 12:4.1.1-43.P1.0.1.el6_6.1
dmraid.x86_64 0:1.0.0.rc16-11.el6 dmraid-events.x86_64 0:1.0.0.rc16-11.el6 dnsmasq.x86_64 0:2.48-14.el6 docker-io.x86_64 0:1.5.0-1.el6
dracut.noarch 0:004-356.0.2.el6_6.2 dracut-kernel.noarch 0:004-356.0.2.el6_6.2 eog.x86_64 0:2.28.2-4.el6 evince.x86_64 0:2.28.2-14.el6_0.1
file-roller.x86_64 0:2.28.2-7.el6 foomatic.x86_64 0:4.0.4-3.el6 foomatic-db.noarch 0:4.0-7.20091126.el6 foomatic-db-ppds.noarch 0:4.0-7.20091126.el6
fuse.x86_64 0:2.8.3-4.0.2.el6 gcalctool.x86_64 0:5.28.2-3.el6 gdm.x86_64 1:2.30.4-64.0.1.el6 gdm-plugin-fingerprint.x86_64 1:2.30.4-64.0.1.el6
gdm-user-switch-applet.x86_64 1:2.30.4-64.0.1.el6 gedit.x86_64 1:2.28.4-3.el6 git.x86_64 0:1.7.1-3.el6_4.1 glx-utils.x86_64 0:10.1.2-2.el6
gnome-applets.x86_64 1:2.28.0-7.el6 gnome-bluetooth.x86_64 0:2.28.6-8.el6 gnome-disk-utility.x86_64 0:2.30.1-2.el6 gnome-disk-utility-libs.x86_64 0:2.30.1-2.el6
gnome-disk-utility-ui-libs.x86_64 0:2.30.1-2.el6 gnome-packagekit.x86_64 0:2.28.3-9.el6 gnome-panel.x86_64 0:2.30.2-15.el6 gnome-power-manager.x86_64 0:2.28.3-7.el6_4
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目的：提取每个包的名字，然后给yum安装。
一气呵成：
for i in $(cat 1.log |xargs -n 2 |awk ‘{print $1}‘);do yum -y install $i;done
傻瓜点儿的办法：
cat 1.log |awk -F‘ ‘ ‘{print $1}‘ >2.log
cat 1.log |awk -F‘ ‘ ‘{print $3}‘ >>2.log
cat 1.log |awk -F‘ ‘ ‘{print $5}‘ >>2.log
cat 1.log |awk -F‘ ‘ ‘{print $7}‘ >>2.log
cat 2.log |xargs -i yum -y install {}标签：xargs
原文地址：http://nosmoking.blog.51cto.com/3263888/1664692
