1.tr 函数的使用:所有的小写字母变成大写
read answer
answer=`echo $answer | tr [a-z] [A-Z]`
把answer中的内容读取出来传递给tr函数,tr函数把answer中所有的小写字母变成大写字母
2.echo的使用:输出但是不换行
echo -n "Can you write device drivers?"
输出但是不换行
3.使用cut选定字段
ls -l | cut -c 1-10 选定每行前10个字符
cut -d : -f 1,5 /etc/passwd 以:为界定符,选取passwd文件的第一个和第五个字段
NOTE:cut区分space和tab.默认的是tab
4.tr命令的使用
语法如下:tr [options] source-char-list replace-char-list
示例:有一个test文件,内容为:aaabbbcccdddefghiii
tr -c "a" "z" < test | cat 得到结果:aaazzzzzzzzzzzzzzzzz,除了a以外,其它字符都用z替换
tr -d "ad" < test | cat 得到结果:bbbcccefghiii,a和d字符被删除
tr -s "ad" < test | cat 得到结果:abbbcccdefghiii,浓缩a和d字符为一个
5.去回车,空格和空行:
enter to space: 去掉回车
tr '\n' ' '
去除所有空格:
sed 's/ //g'
去除多个空格:
sed -e 's/[[:space:]][[:space:]]*/ /g'
去除行首的空格:
sed 's/^[ \t]*//'
把tab变成空格:
sed 's/\t/ /g' filename
删除文件中的空行:
sed /^$/d filename
删除内容为多个空格/tab组成的行:
sed /^[[:space:]]*$/d filename
6.确定一串字符的长度:AWK方法
echo "hsdfsdfds fdsf" | awk '{ printf ("%d",length($0)) }'
EXECUTOR=ecefjma
USER_RIGTHS_FILE=user_rights
[root@xiwen-aly xiwen]# grep ecefjma user_rights
ecefjma francisco.javier.mateos@ericsson.com ADMIN
gawk '$1 == "'$EXECUTOR'" {print $3}' $USER_RIGTHS_FILE
ADMIN
7.关于expr从特定位置取特定长度字符问题:
[root@localhost findcdr]# ms=`expr substr 123456 3 2`
[root@localhost findcdr]# echo $ms
34
8.linux输出指定行
linux输出指定行
eg: 输出第10行。
sed -n "10,1p" filename
显示整个文件: sed -n '1,$'p temp.txt $为最后一行
9.Echo Format character and other advance usage.
echo -n "Please, do "'\E[1;33;44m'"NOT"; tput sgr0
echo -e " book a eselnvmai 1xxx if you DO NOT NEED to run SAPC"; tput sgr0
10. Sed
sed -i '/inset_bf_here/icontent_inserted' /etc/security/limits.conf
[root@aly ~]# echo "qwert aaaaa" | sed 's/\([^ ]\+\).*$/\1/'
qwert
[root@aly ~]# echo " qwert aaaaa" | sed 's|\([^ ]\+\).*$|\1|'
qwert
\1 instead of change, it just display what is regulared.
awk -F"=" '{ print $2 }' | awk -F" " '{ print $1 }'
sed -i s"/^NAME/\/\/NAME/" /opt/telorb/axe/tsp/config/epct/E10Name.epct
echo "NAME "TLM_HS47701_filter4Tra";" >> /opt/telorb/axe/tsp/config/epct/E10Name.epct
7 epct -vF -u /opt/telorb/axe/loadingGroup01_1/TSP6830_SAPC14B_LSV09.config /opt/telorb/axe/tsp/config/epct/E*.epct | tee /tmp/TLM_output
8 echo $?
9 echo -e " AD source: TSP6830_SAPC14B_LSV09\n config: TSP6830_SAPC14B_LSV09.config\n O_STP: $TSP_HOST" > /tmp/TLM_output_cut
10 cat /tmp/TLM_output | grep -e "\*\*" -A 200 >> /tmp/TLM_output_cut
11 cat /tmp/TLM_output_cut
12 cat /tmp/TLM_output_cut | grep -v generating | grep -v copying > upgradePackages/TLM_HS47701_filter4Tra/info.txt
13 cp -a upgradePackages/* /opt/telorb/axe/upgradePackages/
14 echo $?
15 exit
$ xedit /opt/mirror/tsp/ss7/cnf/signmgr.cnf &
Properly set the "location" fields:
export.location=/opt/mirror/tsp/ss7/cnf/
config.location=/opt/mirror/tsp/ss7/cnf/config/
template.location=/opt/mirror/tsp/ss7/cnf/templates/
import.location=/opt/mirror/tsp/ss7/cnf/
Comment out the "rio" fields:
# Remote I/O parameters (used by Signalling Manager applet)
# rio.host.name=platform-vip
# rio.user.name=telorb
# rio.protocol.type=sftp
# rio.timeout=20000
Go to the Signaling Manager bin location:
$ cd /opt/SignallingManager/bin/
Start the Signaling Manager GUI:
$ ./signmgui &
cd /opt/mirror/tsp/ss7/cnf/
cp signmgr.cnf signmgr.cnf.`date +%y%m%d`
sed -i 's/^export.location=\(.*\)/export.location=\/opt\/mirror\/tsp\/ss7\/cnf\//' signmgr.cnf
sed -i 's/^config.location=\(.*\)/config.location=\/opt\/mirror\/tsp\/ss7\/cnf\/config\//' signmgr.cnf
sed -i 's/^template.location=\(.*\)/template.location=\/opt\/mirror\/tsp\/ss7\/cnf\/templates\//' signmgr.cnf
sed -i 's/^import.location=\(.*\)/import.location=\/opt\/mirror\/tsp\/ss7\/cnf\//' signmgr.cnf
sed -i '/^rio./s/^/#/' signmgr.cnf
./signmgui &
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