shell-06 字符串类:

shell-06 字符串类:_第1张图片
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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 [email protected] 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 &

云平台开发运维解决方案@george.sre

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